help, please! ♡ (photo attached)

Answer:

x=-3

Step-by-step explanation:

By the concept of linear equation :

$1,500 was spent on flights,

$680 was spent on hotels,

$7,300 was spent on other purchases.

An algebraic equation with simply a constant and a first-order (linear) term, such as y=mx+b, where m is the slope and b is the y-intercept, is known as a linear equation. The variables in the previous sentence, y and x, are referred to as a "linear equation with two variables" at times. Ax+By=C represents a two-variable linear equation in its standard form. As an illustration, the conventional form of the linear equation 2x+3y=5 It is rather simple to locate both intercepts when an equation is stated in this way (x and y). For the purpose of resolving systems involving two linear equations, this form is also highly helpful.

Given:

Flights: 4 points per dollar

Hotels: 2 points per dollar

Other: 1 point per dollar.

Total spent = $9,480

Points earned = 14,660

Let

x = money spent on flights

y = money spent on hotels

z = money spent on other purchases.

Because the money spent on flights was $140 more than twice the money spent on hotels, therefore

x = 2y + 140          (1)

Total charges were $9,480, therefore

x + y + z = 9480    (2)

Total points earned was 14,660. Therefore

4x + 2y + z = 14660   (3)

Subtract (2) from (3).

4x + 2y + z - (x + y + z)

= 14660 - 9480

3x + y = 5180             (4)

Substitute (1) into (4).

3(2y + 140) + y = 5180

7y + 420 = 5180

7y = 4760

y = 680

From (1), obtain

x = 2y + 140

= 2(680) + 140

= 1500

From (2), obtain

z = 9480 - (x + y)

= 9480 - (1500 + 680)

= 7300

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Answer: 4

The transformation that relates the two functions:

f(x) = y = -√(-4x)

g(x) = y = √(-4x)

Is a reflection across the x-axis.

We define a reflection across the x-axis as a transformation that does a "vertical reflection" along the line y = 0 (which is the x-axis).

For a function f(x), a reflection across the x-axis generaste the new function g(x) that can be written as:

g(x) = -f(x).

In this case the original function is:

f(x) = y = -√(-4x)

And the transformed function is:

g(x) = y = √(-4x)

You can see that the only difference is the sign, such that we can write:

g(x) = -f(x) = -(-√(-4x)) = √(-4x)

So we conclude that the transformation is a reflection across the x-axis.

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1) Only 2

1) Examining the expressions we have

1. -5/8+3/5 =-1/40 Rational Expression

2. 1/2+ √2 Irrational Expression

3.(√5)×(√5)= 5 Rational Expression

4. 3×(√49) = 21 Rational Expression

2) Since √2 is an irrational number √2 = 1.4142.... non-periodic and infinite number, and number added to it will yield an irrational number.

3) So the answer is 1) Only 2

Answer:

2

Step-by-step explanation:

because average of 1 and 2 is 1.5 rounded is 2

The standard deviation of your revenues in a day is 14.

The square root of the variance is used to calculate the standard deviation, a statistic that expresses how widely distributed a dataset is in relation to its mean.

Let x be the revenue from hats.

And let y be the revenue from sunglasses.

And z be the total revenue.

Then according to the question:

z = 10x + 5y

You know the expected number of hats sold in a day is 10 with standard deviation 1.

σₓ = 1

σy = 2

Taking squares of both of the equation.

σₓ² = 1² = 1

σy² = 2² = 4

To find the standard deviation of your revenues in a day:

V(z) = (10)²σₓ² + 5²σy²

V(z) = (100)(1) + (25)(4)

V(z) = 200

Standard deviation,

σz² = √(200)

σz² = 10√(2)

σz² = 14.14

σz² ≈ 14

Therefore, the required standard deviation is 14.

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The equation of the line for the given slope 1 is y= x + 2

Equation of the line:

An equation of the line refers the algebraic form of representing the set of points, which together form a line in a coordinate system.

Given,

The point where the graphs of two equations intersect has y-coordinate 2. One equation is y = -3x + 5.

Here we need to find the other equation if its graph has a slope of 1.

We know that, the general representation of equation of line is y= ax + b

where a is the slope and b is the y intercept.

Through the given details we know that the slope of the line is 1 and why is point where two lines intersect hence, it is the intercept.

And the intercept value is 2.

Therefore, the equation of the other line is y= x + 2

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Answer:

D

Step-by-step explanation:

Translation 4 units right and 1 unit up

Answer:

1: 75

Step-by-step explanation:

20cm : 15m

Convert meters to cm

1 meter = 100 cm

15m = 15 x 100 = 1500 cm

20cm:1500cm

Divide both sides of the ratio by 20

=> 1 : 1500/20 = 1: 75

The ratio of 20cm to 15m in the form 1:n is 1:75.

A ratio is a mathematical comparison of two or more quantities expressed in terms of the number of times one quantity contains another quantity.

It is used to express the relationship between two or more numbers or variables and is usually written as a fraction or with a colon between the two numbers.

We have,

First, we need to convert both measurements to the same unit.

Let's convert 20cm to meters:

20 cm = 20/100 m = 0.2 m

Now we can express the ratio of 20cm to 15m as:

0.2m : 15m

To simplify this ratio, we can divide both sides by the greatest common factor of the two numbers, which is 0.1m:

0.2m/0.1m : 15m/0.1m

2 : 150

Finally, we can simplify the ratio by dividing both sides by 2:

1 : 75

Therefore,

The ratio of 20cm to 15m in the form 1:n is 1:75.

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Answer: wut

Step-by-step explanation: wut

The difference quotient of f(x) is:[ f(x + h) - f(x)]/h =  8x + 4h + 3

Here we have the function:f(x) =4x^2 +3x - 5

And we want to get the difference quotient that can be written as:

[f(x + h) - f(x)]/h

Replacing the function we get:

[f(x + h) - f(x)]/h = [4*(x + h)^2 + 3*(x + h) - 5 - 4*x^2 - 3x + 5]/h

Solving further (open the brackets), we have

[f(x + h) - f(x)]/h = [4x^2 + 8*x*h + 4h^2 + 3x + 3h  -5 - 4x^2 - 3x + 5]/h

Evaluate the like terms

So, we have

[f(x + h) - f(x)]/h = [8*x*h + 4h^2 + 3h]/h

Evaluate the quotients

[f(x + h) - f(x)]/h = 8x + 4h + 3

That is the difference quotient.

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Answer:

x = 9

Step-by-step explanation:

x = 31.5 / 3.5

x = 9

Answer:

x = 9

Step-by-step explanation:

since 3.5 is being multiplied by x to get 31.5 to get rid of it and leave x by itself you have to divide both sides by 3.5

(3.5x)/(3.5)= (31.5)/(3.5)

x=9

Answer:

Step-by-step explanation:

4 - 3 x = 6 - 5 xx

[tex]-3x+4=6-5xx^{2}[/tex]

x = 1

x = - [tex]\frac {2}{5}[/tex]

Answer:

x=1

Step-by-step explanation:

sense x's are on both sides you need to bring one of them over, add 3x to both sides to get 4=6-2x , then subtract 6 from each side to get -2=-2x , then to get x by itself divide both sides by -2 to get 1=x

Answer:

1 ft   ≈   0.3048 m

1 ft2  ≈   0.09290304 m2

200 ft2   ≈   18.580608 m2

Step-by-step explanation:

The total surface area to paint  =  12 m  *  80 m   =   960 square meters

1 ft   ≈   0.3048 m

1 ft2  ≈   0.09290304 m2

200 ft2   ≈   18.580608 m2

And so one gallon of paint covers about  18.581  square meters.

960 m2  /  ( 18.581 m2 per gallon)  ≈   51.67 gallons

So  51  gallons would not be enough... it would take  52  gallons of paint to cover the wall.

Answer:

=35/95

=(5 x7)/95

=5 x 7/5 x 19

=7/19

The length of the first piece is 3 inches, and the second and third pieces are each 9 inches

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions.

Given that a 21-foot beam is to be cut into three pieces so that the second and third pieces are each 3 times the length of the first piece.

We have to determine the length of each piece.

Let x represents the length of the first piece

As per the given condition,

x + 3x + 3x = 21

7x = 21

x = 21 / 7

x = 3

Thus, the first piece is 3 inch

So 2nd piece is 3×3 = 9 inches ( 3 times to first piece )

And 3rd  piece is  3×3 = 9 inches (  3 times to first piece )

Therefore, the length of the first piece is 3 inches, and the second and third pieces are each 9 inches

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Answer: y = 1

Step-by-step explanation:

y = 2(-1) +3

y = -2 + 3

y = 1

Answer:

y = (3/2)x + 2

assuming that the question is to find y in its simplest form.

Step-by-step explanation:

2y=3x+4

(1/2)*(2y)= (1/2)*(3x+4)

y = (3/2)x + 2

Answer:

[tex]5^{15}[/tex] × 120 = 30,517,578,125 × 120

Step-by-step explanation:

Graph

Procedure

Answer: 01-2x > 3x - 6

Step-by-step explanation: distributive property

Using a system of equations, supposing that she spent $19.65, the amounts are as follows:

A system of equations is when multiple variables are related, and equations are built to find the numeric values of each variable, according to the relations built in the context of this problem.

For this problem, the variables are defined as follows:

She brought a total of 26 desserts, hence:

x + y = 26.

She spent a total of $19.65, hence, considering the price of each item:

0.65x + 0.9y = 19.65.

From the first equation, we have the following relation:

y = 26 - x.

Hence, replacing in the second, we can solve for x as follows:

0.65x + 0.9(26 - x) = 19.65

0.25x = 3.75

x = 3.75/0.25

x = 15 cookies.

Then the number of brownies is found as follows:

y = 26 - 15 = 11 brownies.

We suppose that she spent $19.65, and that the problems asks for the amounts of cookies and brownies purchased.

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The result of the expression given is 3x - 3

To solve this problem, we have to simplify the equation, and write the expression.

Given that

[tex]\sqrt{x^2}+ 2x -3[/tex]

For every square root having a square inside, they both cancel out each other to have the variable only.

Lets apply that in this expression

[tex]\sqrt{x^2} + 2x - 3\\x + 2x - 3[/tex]

To solve the expression, we would have the final answer to the question.

[tex]x + 2x - 3\\3x - 3[/tex]

The value of the expression given is 3x - 3

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The percent of decrease in the billing rate is 2.37%.

It should be noted that a percentage decrease is calculated as

= Decrease in value / Initial value × 100

Let's assume the following:

Initial amount = $220

New amount = $214.79

Decrease in amount = $220 - $214.79 = $5.21

The percentage decrease will be:

= 5.21 / 220 × 100

= 2.37%

The question is incomplete and the values were assumptions.

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INFORMATION:

We know that:

- stack of mail consists of 8 bills, 10 letters, and 6 advertisements.

- One piece of mail is drawn at random and put aside. Then a second piece of mail is drawn.

And we must find P (both are letters)

STEP BY STEP EXPLANATION:

To find the probability, we need to know that we have two events. First, when one piece of mail is drawn at random and put aside and, second, when a second piece of mail is drawn.

These two events are dependent. If A and B are dependent events, P(A and B) = P(A) • P(B after A) where P(B after A) is the probability that B occurs after A has occurred.

So, first

- Probability of A (the first piece is letter)

- Probability of B after A

Since A already occurred and one piece of the mail was drawn (a letter), now in total we would have 9 letter and 23 total pieces

Finally, replacing in the initial formula

Finally, the probability would be 0.1630

ANSWER:

P (both are letters) = 0.1630

1) Wrong statement:

The difference between the experimental and theoretical probability is 1/10

Correct statement:

The difference between the experimental and theoretical probability is 3/200

2) Wrong statement:

The difference between the experimental and theoretical probability is 1/10

Correct statement:

The difference between the experimental and theoretical probability is 3/200

N(Pennies) = 6

N(Nickels) = 8

N(Dimes) = 4

N(quarters) = 7

N(total) = 6 + 8 + 4 + 7

N(total) = 25

1) The theoretical probability of selecting a dime = 4/25

The experimental probability of selecting a dime = 30/150 = 1/5

B is wrong because theoretical probability is 4/25, not 9/50

Wrong statement:

The theoretical probability of selecting a dime is

Correct statement:

The theoretical probability of selecting a dime is 4/25

2) The experimental probability of selecting a penny = 45/200 = 9/40

The theoretical probability of selecting a penny = 6/25

Difference between experimental and theoretical probability = 6/25 - 9/40

Difference between experimental and theoretical probability = 3/200

Wrong statement:

The difference between the experimental and theoretical probability is 1/10

Correct statement:

The difference between the experimental and theoretical probability is 3/200

Answer:

175g

Step-by-step explanation:

100.000g+75.0g= 175g

ps. pls give brainliest answer :)

The sum of the numbers 100.000g and 75.0g in expression is 175g.

Calculate the answer using a math operator is referred to as a mathematical operation.

Basic mathematical operations are addition, multiplication, subtraction and division.

The given numbers are,

100.000g and 75.0g

The zeros can be neglected after decimal points,

So the numbers can be written as,

100g and 75g.

To find the required expression, add 100g and 75g.

100g + 75g = 175g.

The required sum of the numbers is 175g.

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Answer: x=37/3

Step-by-step explanation:

8x-11+5x+2x+6=180 ==> three angles of a triangle add up to 180 degrees

8x+5x+2x-11+6=180

13x+2x-5=180

15x-5=180

15x=185

x=185/15

x=37/3