A recipe for limeade calls for 10 limes, 0.25 cups of sugar, 1 quart of water, and 1 sprig of mint, and yields eight 4-fluid-ounces servings. How many limes would you need to make fifteen 0.75 cups servings of limeade.

Answers

Answer 1

0.9375 limes are required to make 0.75 cups servings of limeade.

Unitary method is a concept in which the value of a single unit is first found out and then multiplied by the necessary value to get the required answer.

Here, we are given that a recipe for limeade calls for 10 limes and gives us eight cups of servings of limeade.

⇒ 10 limes make up 8 cups

Number of limes required for 1 cup of limeade = 10/8

= 1.25 limes

Thus, limes required for making 0.75 cups of limeade = 1.25 × 0.75

= 0.9375 limes

Thus, 0.9375 limes are required to make 0.75 cups servings of limeade.

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Related Questions

Challenge Yossi used to have a square garage with 230 ft2 of floor space. He recently built an addition to it. The garage is still a​ square, but now it has​ 50% more floor space. What was the length of one side of the garage​ originally? What is the length of one side of the garage​ now? What was the percent increase in the length of one​ side?

Answers

with the original length as 15.17 feet and the new length as 18.57 feet, there is an increase of 22.41 % in the length of the garage.

We are given that Yossi has a garage of area = 230 feet²

We know that area of square is:

A = side²

230 = s²

s = √ 230

s = 15.17 feet

Now area is increased by 50 %

New area = 230 + 50% of 230

A' = 230 + 115

A' = 345 feet²

s² = 345

s = √ 345

s = 18.57 feet

Percent increase in length = 18.57 - 15.17 / 15.17 × 100

Percent increase in length = 22.41 %

Therefore, with the original length as 15.17 feet and the new length as 18.57 feet, there is an increase of 22.41 % in the length of the garage.

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1/2 of the candles on Claire's birthday cake are pink. 2/10 of the candles are green. The rest are red. What fraction of the candles is red?

Answers

Answer:

Step-by-step explanation:

10 would be the total, since 2/10 are green. 1/2 of 10 is 5, so 5 candles are pink. 5+2=7. 10-7=red candles (3), there is ultimately 3 candles that are red.

10. A chemist needs to mix an 18% acid solution with a 45% acid solution to obtain 12 liters of
36% solution. How many liters of each of the acid solutions must be used?

Answers

Answers:

4 liters of the 18% acid

8 liters of the 45% acid

========================================================

Explanation:

Let's call the bottles A and B

Bottle A has 18% acidBottle B has 45% acid

x = amount, in liters, of bottle A used

12-x = amount, in liters, of bottle B used

Bottle A has 0.18x liters of pure acid

Bottle B has 0.45(12-x) liters of pure acid

These amounts must add to 0.36*12 = 4.32 liters of pure acid since we want 12 liters of a 36% solution.

So,

0.18x + 0.45(12-x) = 4.32

0.18x + 0.45(12)+0.45(-x) = 4.32

0.18x + 5.4-0.45x = 4.32

-0.27x + 5.4 = 4.32

-0.27x = 4.32 - 5.4

-0.27x = -1.08

x = (-1.08)/(-0.27)

x = 4 liters which is the amount of bottle A needed

12-x = 12-4 = 8 liters is the amount of bottle B needed

--------------------

Check:

Using 4 liters of bottle A means we contribute 4*0.18 = 0.72 liters of pure acid from this bottle alone.

Using 8 liters from bottle B adds another 8*0.45 = 3.6 liters of pure acid

Then, 0.72+3.6 = 4.32 which matches with the 4.32 mentioned earlier. Therefore, the answer is fully confirmed.

Lynn wants to multiply
44
×
305
. She says that all she has to do is find
4
×
305
and then double that number.
Which explains whether or not Lynn's method will give her the correct answer?

Answers

Statement (C) "Lynn's method will not give her the correct answer. Multiplying by 4 and then doubling the product is the same as multiplying by 8, not by 44" is the correct explanation of the above-given situation.

What are mathematical operations?An operation is a function in mathematics that converts zero or more input values (also known as "operands" or "arguments") to a well-defined output value. The operation's arity is determined by the number of operands.

So, 4 × 305 = 1220

Double of 1220: 1220 + 1220 = 2440Which is equal to: 8 × 305 = 2440and not equal to 44 × 305 = 13420

Therefore, statement (C) "Lynn's method will not yield the correct result. Multiplying by 4 and then doubling the result is equivalent to multiplying by 8, not 44 "is the correct explanation for the situation described above.

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The complete question is given below:

Lynn wants to multiply 44 × 305 44×305. She says that all she has to do is find 4 × 305 4×305 and then double that number. Which explains whether or not Lynn's method will give her the correct answer?

A. Lynn's method will give her the correct answer. Multiplying by 4 and then doubling the product is the same as multiplying by 44.

B. Lynn's method will not give her the correct answer. Multiplying by 4 and then doubling the product is the same as multiplying by 6, not by 44.

C. Lynn's method will not give her the correct answer. Multiplying by 4 and then doubling the product is the same as multiplying by 8, not by 44.

D. Lynn's method will not give her the correct answer. Multiplying by 4 and then doubling the product is the same as multiplying by 16, not by 44.

Jim and Henry have played 41 tennis matches.
Jim has won 23 times.
Henry won the rest.
a) Estimate the probability that Jim wins.
b) Estimate the probability that Henry wins.

Answers

Answer:

a) The probability that Jim wins is 0.56.

b) The probability that Henry wins is 0.44.

Step-by-step explanation:

Hope this helps!

PLEASE HELP URGENT

If m<4=37°, find m<1,m<2,m<3

Answers

i would need a photo of the lines to find the values of other angles

A change in temperature of 6°C is equivalent to a change in temperature of
°F.

Answers

The chart shows 1C is equal to 1.8F and 2C as 3.6 so continuing the pattern it would be 10.8°F

When Arjun makes strawberry milk, he adds 90\,\text{mL}90mL90, start text, m, L, end text of milk for every 20\text{ mL}20 mL20, start text, space, m, L, end text of strawberry syrup. Arjun's brother, Eli, adds 180\,\text{mL}180mL180, start text, m, L, end text of milk for every 45\text{ mL}45 mL45, start text, space, m, L, end text of strawberry syrup.
Which strawberry milk has a stronger strawberry taste?

Answers

Eli's strawberry milk has a stronger strawberry taste than Arjun.

According to the question we have been given that

Arjun ,       adds milk = 90ml

                in strawberry syrup = 20ml

Eli,             adds milk = 180ml

                in strawberry syrup = 45ml

We need to find whose strawberry milk has stronger strawberry taste that is we have to find the concentration of the solution.

The formula for the concentration is given as :

   Concentration of the solution = [tex]\frac{volume of solute}{volume of solution}[/tex]  * 100%

For Arjun,  

        Volume of solvent = 90ml

      Volume of solute = 20ml

     Volume of solution = 20+90 ml = 110 ml

Concentration = (20/110)*100%

                        = 18.18%

For Eli,

         Volume of solvent = 180ml

      Volume of solute = 45ml

     Volume of solution = 180+45 ml = 225 ml

Concentration = (45/225)*100%

                        = 20%

As we can see that the Eli's concentration of the solution is greater than Arjun's. Hence Eli's strawberry milk has a stronger strawberry taste.

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Carlos read 150 words in one minute. He
read 5 times as many words as his younger
brother. How many words did his younger brother
read in one minute?

Answers

Answer:

30

Step-by-step explanation:

150/5 = 30

Answer: 30

Step-by-step explanation:

51 is a multiple of 2,3,5,6,9,10 or none

Answers

Based on the numbers given, we can say that 51 is a multiple of 3.

What is 51 a multiple of?

51 is not a prime number which means that it has factors and it is a multiple of several numbers.

The factors of 51 include:

1, 3, 17, and 51

Out of the numbers given of 2,3,5,6,9,10, it therefore means that 51 is a multiple of only one number which is 3. When 3 is multiplied by 17, it gives 51.

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What is the reciprocal of the divisor 5 1/5 divided by 1/10

Answers

The reciprocal of the divisor 5 1/5 divided by 1/10 is 10.

The reciprocal of the divisor: Reciprocal and division of fractions are two different methods. When the numerator and denominator of a fraction are interchanged, then it is said to be its reciprocal. Suppose a fraction is a/b, then its reciprocal will be b/a. A fraction is a numerical quantity that is not a whole number.

The reciprocal of the divisor 5 1/5 divided by 1/10

To the reciprocal of the divisor.

Equation: 5 1/5 divided by 1/10

1st: Flip the 1/10 to become 10/1

2nd: Change division to multiplication

New equation: 5.1/5.10/1

⇒ 50/5

       ⇒ 10.

The reciprocal of the divisor 5 1/5 divided by 1/10 is 10.

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The triangle has side lengths l,m, and n. Find the length of each side and the perimeter of the triangle. (PLEASE SHOW WORK)

Answers

The measure of the sides is 27, 23 and 16 and the perimeter is 56 respectively

The perimeter of a triangle

The triangle is a 2 dimensional shape that has 2 sides.

Given the following sides

l = m + n - 12

n = m - 7

m = l - 1/4n

l = m + 1/4n

Substitute

m + 1/4n = m + m - 7 - 12

m + 1/4(m-7) = 2m - 19

m + 1/4m - 7/4 = 2m - 19

-m + 1/4m = -19 + 7/4

-3/4m = -19(4)+7/4

-3/4m = -69/4

-3m = -69

m = 23

Hence the value of m from the given expression is 23

n = 23 - 7

n = 16

l = 23 + 16 -12

l = 39 - 12

l = 27

n = 23 - 7

n = 16

Hence the measure of the sides is 27, 23 and 16 respectively

Perimeter = 27+23+16

Perimeter = 56

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Find an expression which represents the sum of (3x+9y) and (5x+7y) in simplest forms

Answers

The sum of the expression in simplest form is 8( x + 2y)

What are algebraic expressions?

Algebraic expressions are expressions made up of variables, terms, factors, constants and coefficients.

They are also made up of mathematical operations such as addition, subtraction, multiplication, division, etc

Given the expressions;

(3x+9y) and (5x+7y)

Let's find the sum

3x + 9y + 5x + 7y

collect like terms

3x + 5x + 9y + 7y

8x + 16y

Find common factor

8( x + 2y)

Thus, the sum of the expression in simplest form is 8( x + 2y)

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The length of a race is 9/10 mile. Andrew wants to place a flag every 1/3 mile. He has
3 flags. Does he have enough flags?

Answers

Answer:

Yes, he will have more than enough flags, 1/3*3 flags is 1 mile, the race is only 9/10 miles.

Step-by-step explanation:

Brianna practices the piano for 30 minutes per day. Write an expression for the number of hours she practices after n days.

Find the number of hours Brianna practices in 2, 4, and 10 days.

(Thank you in advance for helping me)

Answers

The answer is 1/2

Explanation:

Brianna practices the piano 30 minutes each day.
Than she practices in d days.
30 minutes = 1/2 hour
The total number of hours she practice = (d × 1/2) hours

Answer: 1/2 * n

1 hour of practice in 2 days

2 hours of practice in 4 days

5 hours of practice in 10 days

Step-by-step explanation:

60 minutes=1 hour

30 minutes * 1 hour/60 minutes=

30*1/60=

30/60=1/2 hour.

1/2 * n

1/2 * 2 = 1 hour of practice in 2 days

1/2 * 4 =

4/2 = 2 hours of practice in 4 days

1/2 * 10=

10/2 = 5 hours of practice in 10 days

Is the following relation linear, quadratic, or cubic? If it is linear, find the equation. Explain your reasoning and include all of your work in your final answer.

p = {( x, y ) : (1, 0), (2, 4), (3, 8), (4, 12), . . . }

Answers

Since the rate of change is constant, the relation is linear, and is modeled by:

y = 4x - 4.

What is a linear function?

A linear function is modeled by:

y = mx + b

In which:

m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

For this problem, we have that when x changes by 1, y always changes by 4, hence we have a linear relation with a slope of 4, given as follows:

y = 4x + b

When x = 1, y = 0, hence we use it to find b as follows:

0 = 4 + b

b = -4.

Hence the relation is:

y = 4x - 4.

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PLEASE HELP !! 51 POINTS !!
Students were asked to simplify the expression the quantity cosecant theta minus sine theta end quantity over cosecant period Two students' work is given.

Student A

Step 1: cosecant theta over cosecant theta minus sine theta over cosecant theta

Step 2: 1 minus sine theta over the quantity 1 over sine theta end quantity

Step 3: 1 − sin2 θ

Step 4: cos2 θ

Student B

Step 1: the quantity 1 over sine theta end quantity minus sine theta over the quantity cosecant theta

Step 2: the quantity 1 minus sine squared theta end quantity over sine theta all over cosecant theta

Step 3: cosine squared theta over sine squared theta

Step 4: cot2 θ

Part A: Which student simplified the expression incorrectly? Explain the errors that were made or the formulas that were misused. (5 points)

Part B: Complete the student's solution correctly, beginning with the location of the error. (5 points)

Answers

Answer:

Student B

Step 1: the quantity 1 over sine theta end quantity minus sine theta over the quantity cosecant theta

Step 2: the quantity 1 minus sine squared theta end quantity over sine theta all over cosecant theta

Step 3: cosine squared theta over sine squared theta

Step 4: cot2 θ

Step-by-step explanation:

1.Elisa drew a triangle with coordinates (2, 4), (5, 3), and (7, 2). She drew an image of the triangle with coordinates (−1, 4), (2, 3), and (4, 2). Which rule best describes the transformation?

Answers

The rule that best describes the transformation is (x, y) = (x - 3, y)

How to determine the rule that best describes the transformation?

The points of the triangle have the coordinates

(2, 4), (5, 3), and (7, 2).

The image of the triangle have the coordinates

(−1, 4), (2, 3), and (4, 2)

When the above points and the image are compared, we can see that the y-coordinates remain unchanged

This means that the triangle is translated horizontally

Using points (2, 4) and (-1, 4);

We have

(x, y) = (-1 - 2, 4 - 4)

Evaluate

(x, y) = (-3, 0)

Rewrite as

(x, y) = (x - 3, y)

Hence, the rule that best describes the transformation is (x, y) = (x - 3, y)

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The volume of a rectangular pyramid is 1020 units. If the length of the rectangular
base measures 10 units and the width of the rectangular base measures 18 units, find
the height of the pyramid.

Answers

The volume of a rectangular pyramid is 1020 units is 5.67 units

The volume of a rectangular pyramid is 1020 units.

volume of rectangular pyramid = LBH

L= length of the rectangular base

B=  width of the rectangular base

H=  height of the pyramid

here L= 10units B= 18 units

V= LBH

H=V/(LB)

  = 1020/(10)(18)

  = 5.67 units

Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units or by various imperial units. The definition of length is interrelated with volume

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Triangle ABC lies on the coordinate plane with vertices located at A(7,6), B(-3,5), and C(-4,9). The triangle is transformed using the rule (x,y) -> (2x,y-3) to create triangle A'B'C'. Select all possible answers for the vertices of triangle A'B'C'.

Question 1 options:

(14,3)


(9,3)


(-6,10)


(-8,6)


(-6,2)

Answers

The correct options are (a) , (14,3) , (d), (-8,6) and (e) , (-6,2)

By concept of translation, the coordinates of new triangle A'B'C' are given as follows:

A' (14, 3), B' (-6,2), C (-8, 6).

What is a translation?

A translation can be define or represented by a change in the graph of a function, which are done by the means of operations such as multiplication, addition or subtraction either in it’s range(i.e. the values of y) or in it’s domain(i.e. the values of x). Examples are compression of points or shifting  left right or bottom up, stretching and reflections over the axis that is the x-axis or the y-axis, or rotations around the origin.

For the given question, the translation rule is given as follows:

(x , y) -> (2x, y-3).

Applying the rule to each point of triangle, we have that:

A': (2(7), 6-3) = (14, 3).

B': (2(-3), 5-3) = (-6, 2).

C': (2(-4), 9-3) = (-8, 6).

Thus, the coordinates of triangle formed i.e. A'B'C' are given as follows:

A' (14, 3), B' (-6,2), C' (-8, 6).

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The complete question is:

Triangle ABC lies on the coordinate plane with vertices located at A(7,6), B(-3,5), and C(-4,9). The triangle is transformed using the rule (x,y) -> (2x,y-3) to create triangle A'B'C'. Select all possible answers for the vertices of triangle A'B'C'.

Question 1 options:

a. (14,3)

b. (9,3)

c. (-6,10)

d. (-8,6)

e. (-6,2)

I need help with this question

Answers

The direction of the resultant vector is 58 degrees east-north if the mouse walks 15 m east, makes a 90° left turn, walks 8 m, makes another 90° left turn, and walks 10 m.

What is a vector?

It is defined as the quantity that has magnitude as well as direction also the vector always follows the sum triangle law.

It is given that:

A mouse is trapped in a maze.

He walks 15 m east, makes a 90° left turn, walks 8 m, makes another 90° left turn, and walks 10 m.

Based on the data given:

tanA = 8/(-10+15) = 8/5

A = tan⁻(8/5)

A = 58 degrees

The direction will be 58 degrees east-north

Thus, the direction of the resultant vector is 58 degrees east-north if the mouse walks 15 m east, makes a 90° left turn, walks 8 m, makes another 90° left turn, and walks 10 m.

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Pa answer please, need lang for grade 11 students

Answers

Juan is paid 1575 pesos, 1800 pesos, 2137.5 pesos

It is given that Juan Dela Cruz is paid 45 peso for every hour he works for up to 40 hours and 1.5 times i.e. 67.5 pesos for every hour after 40 hours.

The first part asks for Juan's earning if he works 35 hours

Therefore , according to the function,

Juan's pay = 35 x 45 = 1575 pesos

The second part asks for Juan's earning for 40 hours

Therefore, according to the function,

Juan's pay for 40 hours = 40 x 45 =1800 pesos

The third part asks for Juan's earning for 45 hours

Juan's pay for 45 hours according to the function=

67.5h-900 = 67.5 x 45 -900 = 2137.5 pesos

Hence, Juan is paid 1575 pesos, 1800 pesos, 2137.5 pesos

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Can you help solve this problem?

Answers

Answer:

22 and 23

Step-by-step explanation:

The first step is to make an equation that models this problem. Since the two numbers are consecutive, make them [tex]x[/tex] and [tex]x+1[/tex].

Since it says three times the larger number is 47 more than the smaller number, that means

[tex]3 (x+1) = x+47[/tex]

[tex]3x+3 = x+47[/tex]

[tex]2x+3=47[/tex]

[tex]2x=44[/tex]

[tex]x=22[/tex]

The smaller number is 22, and the larger number is 23.

An online store sells two types of speaker docks for smartphones. The higher-priced speaker dock sells for $190 and the lower-priced speaker dock sells for $80. Last week the store sold three times as many lower-priced speaker docks as higher-priced speaker docks. Combined sales totaled $3,870. How many lower-priced speaker docks did it sell?

Answers

Using a system of equations, it is found that it sold 27 lower-priced speaker docks.

What is a system of equations?

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

For this problem, the variables are given as follows:

Variable x: Amount of the lower-priced speaker sold.Variable y: Amount of the higher-priced speaker sold.

Last week the store sold three times as many lower-priced speaker docks as higher-priced speaker docks, hence:

x = 3y -> y = x/3.

Combined sales totaled $3,870, hence, considering the price of each speaker:

80x + 190y = 3870.

Since x = 3y:

240y + 190y = 3870.

430y = 3870

y = 3870/430

y = 9.

Hence:

x = 3y = 3 x 9 = 27.

It sold 27 lower-priced speaker docks.

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Are test scores a good predictor of the overall grade for a course? A random sample of student grades in an
introductory statistics class was taken. The data are shown.
Test 54 56 36 87 71 69 61 38 72 40
Final 60 60 29 94 76 80 54 26 77 52
The two variables have summary statistics -58.4, -60.8, s. 16.87 and s, -21.89. The formula for the
contribution tor for the first data point is (frac{x (1)-\bar(x)}{s_{x}}) (\frac{y_{1)-\bar(y)s (yl) The value for
y, is
X

Answers

The contribution of the first data point, (54, 60) to correlation is given by the option with the equation equation;

[tex] \displaystyle{\left( \frac{54 - 58.4 }{16.87}\right)\cdot \left( \frac{60 - 60.8}{21.89 }\right)}[/tex]

What is the formula the correlation coefficient?

The correlation coefficient is given by the formula;

[tex]r = \frac{1}{n - 1} \times \sum( \frac{x - \bar{x}}{s_{x} })( \frac{y - \bar{y}}{s_{y} })[/tex]

Where;

(x, y) are the coordinates of a data point.

[tex] \bar{x}[/tex] = The mean for the x-values

[tex]S_{x}[/tex] = The standard deviation of the x-values

[tex] \bar{y}[/tex] = The mean of the y-values

[tex]S_{y}[/tex] = The standard deviation of the y-values

The given parameters are;

[tex] \bar{x}[/tex] = 58.4

[tex]S_{x}[/tex] = 16.87

[tex] \bar{y}[/tex] = 60.8

[tex]S_{y}[/tex] = 21.89

The formula for the contribution of the first data point, (54, 60) to correlation, r, is therefore;

[tex] \displaystyle{\left( \frac{54 - 58.4 }{16.87}\right)\cdot \left( \frac{60 - 60.8}{21.89 }\right)}[/tex]

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I’m confused! About this whole thing can someone help me

Answers

Answer:

Step-by-step explanation:try using quizlet

Antonio is making bread. He has 9/2 cups of flour. Each loaf uses 2/3 cup of flour

How many whole loaves of bread can Antonio make? Will he have flour left over
?

Answers

Antonio can make 6 whole loaves of bread, and he will be left with 1/2 cup of flour, which is used to make 3/4th of a loaf.

In the question, we are given that Antonio is making bread. He has 9/2 cups of flour. We are also informed that each loaf uses 2/3 cup of flour.

We are asked for the number of whole loaves of bread that Antonio can make, and also, we are asked whether he will be left with some flour or not. If yes, then how much?

To find the number of loaves Antonio will make, we will divide the quantity he has by the quantity required for one loaf.

Thus, the number of loaves = (9/2) ÷ (2/3) = 9/2 × 3/2 = 27/4 = 6 3/4.

We will ignore the fractional part as we are asked for whole loaves. Thus, we can say that Antonio will make 6 whole loaves.

Also, he will be left with 3/4th of a loaf, that is, 3/4 of 2/3 cup of flour = 1/2 cup of four.

Thus, Antonio can make 6 whole loaves, and he will be left with 1/2 cup of flour, which is used to make 3/4th of a loaf.

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Please show work, and brainliest will be yours.

Answers

the other statements are.

Converse: If it has a perimeter of 10 cm, then the figure is a rectangle with sides of 2 cm and 3 cm (false)Inverse: If the figure is not a rectangle with sides of 2 cm and 3 cm, then it has a perimeter different than 10cm (false)Contrapositive: "If it has a perimeter different than 10cm, then it is not a rectangle with sides of 2cm and 3cm" (true)

How to get the converse, inverse, and contrapositive statements?

For a conditional statement of the form:

If P, then Q

The other statements are:

Converse: if Q then PInverse: not P, then not Q.Contrapositive: not Q, then not P.

Here the conditional is:

"if a figure is a rectangle with sides 2 cm and 3cm, then it has a perimeter of 10cm"

We can identify:

P = a figure is a rectangle with sides 2 cm and 3cm

Q = it has a perimeter of 10cm

Then the other statements are.

Converse: If it has a perimeter of 10 cm, then the figure is a rectangle with sides of 2 cm and 3 cm

This clearly is false, as we can have a circle with a perimeter of 10 cm.

Inverse: If the figure is not a rectangle with sides of 2 cm and 3 cm, then it has a perimeter different than 10cm

This is also false, the figure can be a rectangle with sides of 1cm and 4 cm for example.

Contrapositive: "If it has a perimeter different than 10cm, then it is not a rectangle with sides of 2cm and 3cm"

This is true. if the figure does not have a perimeter of 10cm, then it can't be a rectangle with sides of 2cm and 3cm

If you want to learn more about conditional statements:

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Calculate the coordinates of the points where the line y = 1 - 2x cuts the curve x^2+ y^2 = 2

Answers

Answer:

[tex](1, -1)[/tex] and [tex](-\frac{1}{5}, \frac{7}{5})[/tex]

In decimal form this would be (1, -1) and (-0.2, 1.4)

Step-by-step explanation:

Basically here we are trying to solve a system of 2 equations. The first one is a straight line and the second is a circle. This can be done graphically and graph is attached. There will be two points where the line cuts the circle so two solution sets

The equations are

Line Equation [tex]y = 1 - 2x[/tex]    (1) and

Circle Equation [tex]x^2+ y^2 = 2[/tex]   (2)


[tex]y=1-2x[/tex]

Plug this value of y into the second equation for the circle
[tex]x^2 + (1-2x)^2= 2[/tex]

Apply the perfect squares formula [tex]\left(a-b\right)^2=a^2-2ab+b^2[/tex]

[tex](1-2x)^2 = 1^2-2\cdot \:1\cdot \:2x+\left(2x\right)^2\\= 1-4x+4x^2\\\\[/tex]

So equation (2) becomes
[tex]1-4x+4x^2 +x^2 = 2 \\\\\\5x^2 -4x - 1 = 0[/tex]

Solve using the quadratic formula
[tex]x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]

Here a is the coefficient of x ², b is the coefficient of x and  c is the constant

So
[tex]x_{1,\:2}=\frac{-\left(-4\right)\pm \sqrt{\left(-4\right)^2-4\cdot \:5\left(-1\right)}}{2\cdot \:5}[/tex]

Now,

[tex]\sqrt{\left(-4\right)^2-4\cdot \:5\left(-1\right)} = \sqrt{\left(-4\right)^2+4\cdot \:5\cdot \:1}[/tex]

= [tex]\sqrt{16+20} = \sqrt{36} = 6[/tex]

Therefore
[tex]x_{1,\:2}=\frac{-\left(-4\right)\pm \:6}{2\cdot \:5}[/tex]

[tex]x_1=\frac{-\left(-4\right)+6}{2\cdot \:5}[/tex] = [tex]\frac{-\left(-4\right)+6}{2\cdot \:5} =[/tex]  [tex]\frac{10}{2\cdot \:5}[/tex] [tex]= 1[/tex]

[tex]x_2 = \frac{-\left(-4\right)-6}{2\cdot \:5}[/tex] [tex]= \frac{4-6}{2\cdot \:5}[/tex] = [tex]-\frac{1}{5}[/tex]

To find corresponding values for [tex]y_1 y_2[/tex] plug these values of [tex]x_1, x_2[/tex] into the line equation

[tex]y_1 = 1- 2(1) = -1[/tex]
[tex]y_2 = 1 - 2(-\frac{1}{5}) = 1 + \frac{2}{5} = \frac{7}{5}[/tex]

So the two points of intersection are

[tex](1, -1)[/tex] and ([tex](-\frac{1}{5}, \frac{7}{5})[/tex].

In decimal form this would be (1, -1) and (-0.2, 1.4)

See attached graph

 


The cost of 4 boxes of pens and 3 boxes of pencils is $22.55. The cost of 3 boxes of pens and 2 boxes of pencils is $16.45. Find the cost of each.

Answers

Answer:

One pen is $4.25 and one pencil is $1.85.

Step-by-step explanation:

Let cost of pens be x and cost of pencils be y.

1. 4x+3y=22.55

2. 3x+2y=16.45

Sub. 1.-2.,

x+y=22.55-16.45

x=6.1-y

Sub. x=6.1-y into 1.,

y=1.85

x=4.25

Answer:

Cost of a box of pens = $4.25

Cost of a box of pencils = $1.85

Step-by-step explanation:

Given information:

Cost of 4 boxes of pens and 3 boxes of pencils = $22.55Cost of 3 boxes of pens and 2 boxes of pencils = $16.45

Define the variables:

Let x = the cost of a box of pens.Let y = the cost of a box of pencils.

Create two equations from the given information:

[tex]\textsf{Equation 1}: \quad 4x + 3y = 22.55[/tex]

[tex]\textsf{Equation 2}: \quad 3x + 2y = 16.45[/tex]

Multiply Equation 1 by 3:

[tex]\implies 3 \cdot 4x + 3 \cdot 3y = 3 \cdot 22.55[/tex]

[tex]\implies 12x + 9y = 67.65[/tex]

Multiply Equation 2 by 4:

[tex]\implies 4 \cdot 3x + 4 \cdot 2y = 4 \cdot 16.45[/tex]

[tex]\implies 12x + 8y = 65.80[/tex]

Subtract the equations to eliminate the term in x:

[tex]\begin{array}{r rr}& 12x+9y = &67.65\\- & 12x+8y = &65.80\\\cline{2-3} & y = & 1.85\end{array}[/tex]

Substitute the found value of y into one of the equations and solve for x:

[tex]\implies 3x + 2y = 16.45[/tex]

[tex]\implies 3x + 2(1.85) = 16.45[/tex]

[tex]\implies 3x + 3.7 = 16.45[/tex]

[tex]\implies 3x =12.75[/tex]

[tex]\implies x=4.25[/tex]

Solution

Cost of a box of pens = $4.25Cost of a box of pencils = $1.85

Learn more about systems of equations here:

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