tristan asked his coworkers about how much time they spent commuting each morning Find the median

By applying the elimination method, the solutions to this system of three linear equations include the following:

In order to determine the solutions to a system of three linear equations, we would have to evaluate and eliminate each of the variables one after the other, especially by selecting a pair of linear equations at each step and then applying the elimination method.

Given the following system of linear equations:

x – y - 3z = 4                .........equation 1.

2x + 3y – 3z = -2          .........equation 2.

x + 3y – 2z = -4            .........equation 3.

From equation 1 and equation 3, we would eliminate x as follows:

x – y - 3z = 4

x + 3y – 2z = -4

-4y - z = 8                  .........equation 4.

Next, we would pick a different pair of linear equations to eliminate x:

(x – y - 3z = 4) × 2   ⇒ 2x - 2y - 6z = 8

2x - 2y - 6z = 8

2x + 3y - 3z = -2

-5y - 3z = 10                ........equation 5.

From equation 4 and equation 5, we would eliminate z to get the value of y:

(-4y - z = 8) × 3 ⇒ -12y - 3z = 24

-12y - 3z = 24

-5y - 3z = 10

-7y = 14

y = 14/7

y = -2.

For the value of z, we have:

-4y - z = 8

z = -4y - 8

z = -4(-2) - 8

z = 8 - 8

z = 0

For the value of x, we have:

x – y - 3z = 4

x = 4 + y + 3z

x = 4 - 2 + 3(0)

x = 2

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8 dlls for silver

16 dlls for brass

5 dlls profit silver

7 dlls profit spheres

Then the price is

8+5= 13 dlls for silver

16+7=23 dlls for brass

Let S and B be the amount of magnetic silver and brass sphers that are sold, respectively.

Then, Ms. Ball estimation is that

Also, she doesn't want to invest more than 20000, so

The objective function is

Subjected to:

GRAPH

The interection is at

So, the extremes must be at (0,1250), (1500,500), (2000,0) , (0,0).

So, if we replace the points

So, the amount she will need to stock to maximize her profit is 1500 of silver and 500 of brass, and the maximum profit is going to be 11000 dlls.

occur

the answer is 12/13 or 0.932

Explanation

when you have an event A, the complement of A, denoted by.

consists of all the outcomes in wich the event A does NOT ocurr

it is given by:

Step 1

find the probability of event A :(P(A)

The probability of an event is the number of favorable outcomes divided by the total number of outcomes possible

so

let

favorable outcome = 4 (there are four 7 in the deck)

total outcomes=52

hence,replacing

Step 2

now, to find the probability that the event does NOT ocurrs ( not drawing a 7)

let's apply the formula

replace

therefore, the answer is 12/13 or 0.932

I hope this helps you

Answer: As we know that the formula of outlier is

IQR = Q3 - Q1

= 52 - 32

= 20

52 + 1.5(20) = 82...

so anything above 82 is an outlier

now

32 - 1.5(20) = 2.

..anything below 2 is an outlier

so...the 83 is outlier

so correct option is D

hope it helps

Step-by-step explanation:

ANSWER and EXPLANATION

We want to solve the problem by using dimensional analysis.

To do this, let us convert the speed of the Bluebirds baseball to miles per hour.

We have that:

1 feet per second = 0.6818 miles per hour

125.4 feet per second = 85.50 miles per hour

As we can see the baseball of the Bluebirds is slower than the Robins (90 miles per hour)

Now, to complete the explanation:

When I convert the Bluebirds pitcher's speed to the same units as the Robins pitcher's speed, the speed is _85.50_ mi/h.

Since the Bluebirds pitcher's speed is _less than_ the Robins pitcher's speed, the pitcher on the __Robins_ throws a faster ball.​

Division operation is operation helps calculate unit rates and unit prices.

Division operation -

What method do you employ to determine the unit rate?

Simple division of the numerator and denominator yields the unit rate. The outcome tells us how many of the units in the numerator to anticipate for each unit in the denominator.

What in mathematics are rate and unit rate?

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The metric system is a system of decimals in which all the measurements are taken as multiples or divisions based on a factor of 10. We have to convert between different units of measurements while working in a pharmacy. Metric system helps to make fast and easy conversions of units of measurements. Therefore, metric system is important to a pharmacy technician.

Given a rectangle with sides "a" and "b":

The area of the rectangle is:

The perimeter of the rectangle is:

Given the sides of the rectangle:

a = 74 ft

b = 93 ft

(a)

The area of the rectangle is:

The perimeter of the rectangle is:

(b) The wood will cover all the area of the court, then the area must the used.

(c) The tape will be placed around the court, then the perimeter must be used.

Answer:

(a)

(b)

(c) Perimeter

Solution

For this case we can calculate the mean in the following way:

And the standard deviation would be:

2. 4+ (-10)

3. 3+(-15)

4.2+5

5. (-10)+(-5)

So, to solve the system:

To solve it, we could substitute the first equation in the second one and then solve for x:

We could solve the previous quadratic by factoring:

To find the values of y, just replace each vaue of x:

Therefore, the solutions of the system are

(x,y) = (-3,-1)

(x,y)=(1,3)

The statement that " There is a 45% chance that it will rain in neither place" is true.

In the question ;

it is given that

Probability of raining here = 50% = 0.5

Probability of raining on mars = 10% = 0.1

So, the probability of not raining here = 1-0.5 = 0.5

and probability of not raining on mars = 1-0.1 = 0.9

Hence the probability of rain in neither place = (probability of not raining here)×(probability of not raining on mars) .

Substituting the values , we get

probability of rain in neither place = 0.5×0.9

= 0.45

= 45%

Therefore , the statement " There is 45% chance that it will rain in neither place" is true.

The given question is incomplete , the complete question is

There is a 50% chance of rain here and a 10% chance of rain on Mars. Therefore, there is a 45% chance that it will rain in neither place.

Is the statement True or False ?

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The inequality is given

To draw the graph of the inequality which is less than equal to

Given:

The population was 100 after 10 mins.

The population was 1500 after 30 mins.

To fill the blanks:

Explanation:

According to the problem, we write,

Dividing equation (2) by equation (1), we get

So, the equation becomes,

a) To find: The initial population

When P = 100 and t = 10, then the initial population would be,

Therefore, the initial population is 25.82.

b) To find: The doubling time

Using the formula,

The doubling time is 5.12 mins.

c) To find: The population after 65 mins

Substituting t = 65 and the initial population is 25.82 in equation (3) we get,

Therefore, the population after 65 mins is 171467.56.

d) To find: The time taken for the population to reach 10000

Substituting P = 10000 and the initial population is25.82 in equation (3) we get,

Therefore, the time taken for the population to reach 10000 is 44.01 mins.

Final answer:

• The initial population is 25.82.

• The doubling time is 5.12 mins.

• The population after 65 mins is 171467.56.

• The time taken for the population to reach 10000 is 44.01 mins.

Solution

Therefore, we find m < 7

The input variable of the function is r, while the output variable is f(r)

The definition of the function is given as

f(r) = πr²

In the above function definition, we have the function to be

f(r)

The definition f(r) implies that

The above is true because, the variable π has its constant value of 22/7

i.e. π= 22/7

While the variable r can change its value

Take for instance:

If r = 7, then we have

f(7) = π x 7²

Evaluate

f(7) = 154

If r = 14, then we have

f(14) = π x 14²

Evaluate

f(14) = 616

See that the value of f(r) changes as r changes

This means that, the stated parameters above are true i.e.

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Answer:

D. 86°

Explanation:

Given:

• The center of the circle = P

• The measure of arc AB = 86°

We want to find the measure of the angle APB.

By Circle's theorem: The measure of an arc is equal to the measure of the central angle subtended by the same arc.

Applying this theorem, we have that:

The measure of the angle APB is 86 degrees.

Option D is correct.

Let the original price of sneakers be x.

Determine the original price of the sneakers.

The intercepts for a function can be on either of the two axis, y or x.

when finding the intercepts of x, means that y = 0

when finding the intercepts of y, means that x = 0

finding the x intercepts

since the solution for the square root of -1 has not any solution on the real numbers, we can say that there is no intercept over the x axis.

finding the y intercepts

there are 2 intercepts on the y axis, these are at y=1 and y=-1

information can be proven by graphing the function

Ready

Points A = (-5, -2) C = (7, 2) E = (1, 0)

1.- Find the slope

m = (y2 - y1) / (x2 - x1)

m = (2 + 2) / (7 + 5)

m = 4/ 12

m = 1/3

2.- Find the equation of the line

y - y1 = m(x - x1)

y + 2 = 1/3(x + 5)

y + 2 = 1/3x + 5/3

y = 1/3x + 5/3 - 2

y = 1/3 x + 5/3 - 6/3

This is the equation:

y = 1/3 x - 1/3

my pleausre

Answer:

P = 0.30

Explanation:

From the table, we see that:

When: x = -5, Probability = 0.15

When: x = 0, Probability = 0.05

When: x = 5, Probability = 0.1

Therefore, the probability of -5 ≤ x ≤ 5 is obtained by the sum of the probabilities from -5 to 5, we have:

Therefore, the probability is 0.30

Notice that the time for both trips is the SAME but not known (let's use the letter T to address this unknown).

We also assign St to the speed of the train, and Sp to the speed of the plane.

Then, the relationship between the speeds according to the information they provide, is given by the equation:

Sp = 5 * St - 30

we also know that the train covers 140 km in the time T, Then according to the formula for speed (distance divided by time) we can say:

St = 140 km / T, therefore T = 140 km / St

We do something similar with the information on the distance covered by the plane:

Sp = 630 km / T which solving for T gives:

T = 630 km / Sp

Now we equal the expressions for T (since that time is the SAME as we noticed before, and get:

630 km / Sp = 140 / St

we corss-multiply to get the speeds in the numerator:

630 St = 140 Sp

ANd we use the very first equation we wrote (Sp = 5 * St - 30)

to replace Sp in terms of St:

630 St = 140 (5 St - 30)

Now use distributive property on the right to eliminate the parenthesis:

630 St = 700 St - 4200

add 4200 to both sides, and subtract 630 St from both sides :

4200 = 700 St - 630 St

4200 = 70 St

divide both sides by 70 to isolate St completely:

St = 4200 / 70

St = 60 km/h (this is the speed of the train)

Now we can find the value of the speed of the plane, using the first equation again:

Sp = 5 * St - 30 = 5 (60) - 30 = 300 - 30 = 270 km/h

Then the speed of the plane is: 270 km/h

The values of the variables x and y such that the conjugate of - 6 - j 24 is found are 3 and 3, respectively.

Let α + i β be a complex number, whose conjugate is the complex number α - i β. In this problem we find the values of the variables x and y such that:

(x + i y) · (3 + i 5) = - 6 + i 24

3 · x + i 3 · y + i 5 · x + i² 5 · y = - 6 + i 24

(3 · x - 5 · y) + i (5 · x + 3 · y) = - 6 + i 24

Then, we need to solve the following system of linear equations:

3 · x - 5 · y = - 6

5 · x + 3 · y = 24

Now we proceed to solve the system algebraically. Clear x in the first equation:

x = (- 6 + 5 · y) / 3

x = - 2 + (5 / 3) · y

Substitute x on the second equation and clear y:

5 · [- 2 + (5 / 3) · y] + 3 · y = 24

- 10 + (25 / 3) · y + 3 · y = 24

34 / 3 · y = 34

(1 / 3) · y = 1

y = 3

Finally, we substitute on y in the first equation:

x = - 2 + (5 / 3) · 3

x = - 2 + 5

x = 3

The values of the variables x and y are 3 and 3, respectively.

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We have three different figures

Semicircle

r = 4cm

Square

l = 8cm+

You have the following expression:

"the sum of five squared and five"

the previous statement, in a mathematical form is:

5² + 5

It is important to point out that you have "the sum" of two numbers, which numbers? five squared and five.

The simplified form is:

5² + 5 = 25 + 5 = 30

so the answer is 2282

We have the measure of angles 1 and angle 2, as we can see from the diagram in the image, angles 1 and 2 added form the right angle (90°) in the figure.

Thus, the sum of x-6 and 5x, must be equal to 90°.

(a) Write an equation:

(b) To find the degree measure of each angle, first we need to solve for the value of x in the equation.

Combining like terms:

Adding 6 from both sides:

Divide both sides by 6:

Now that we have x, we find angle 1:

And the measure of angle 2:

five and seventy-nine hundredths = 5.79

Substitute x = - 12 in each of the given equation, if the equation satisfy then tha x = -1 2

F) 1/2x + 22 = 20

1/2 ( -12) + 22 = 20

(-6) + 22 = 20

16 is not equal to 22

G) 15 -1/2x = 21

Substitute x = -12 in the expression :

15 - 1/2( -12) = 21

15 + 1/2(12) =21

15 + ( 6) = 21

21 = 21

Thus, The equation 15 - 1/2x = 21 is true for x = -12

H) 11 - 2x = 17

Susbstitute x = ( -12) in the equation :

11 - 2x = 17

11 - 2( -12) = 17

11 + 24 = 17

35 = 17

Since, 35 is not equal to 17

D) 3x - 19 = -17

SUsbtitute x = ( -12)

3( -12) - 19 = -17

-36 - 19 = -17

-36 = -17 + 19

-36 = 2

Since - 36 is not equal 2

Answer : G) 15 - 1/2x = 21