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klio [65]
3 years ago
14

PLEASE HELP ME THIS IS MY FINAL !!!!

Mathematics
1 answer:
Alenkinab [10]3 years ago
7 0

Answer:

it would take 20 miles and cost 10 dollars.

Step-by-step explanation: Like up the equations so that 50x=40x+200. When you solve for x (number of miles) you find that x=20. Use 20 in either equation (0.5x or 0.4x+2) to get 10 (total cost).

You might be interested in
Which are the coordinates of the vertices of a triangle congruent to ΔPQR?
user100 [1]

Answer:

(4,3), (−4,8), (−4,3)

(2.5,−4), (0,0), (0,−4)

Step-by-step explanation:

On plotting on graph all form right angled triangle.

Dimension of all triangles and tanФ

  1. Base=2 Height=5   tanФ  2.5
  2. Base=5 Height=3   tanФ  1.6
  3. Base=8 Height=5   tanФ  1.6
  4. Base =2.5 Height=4   tanФ  1.6

[Here base and height can be interchanged if needed]

Ratio of perpendicular and base of last two triangle is equal.

First two are not congruent to any of other triangle but 3rd and 4th triangle are congruent .

Their coordinates are:

(4,3), (−4,8), (−4,3)

(2.5,−4), (0,0), (0,−4)

7 0
3 years ago
Read 2 more answers
8. The ratio of boys to girls in 7th period is 2 to 7. If there are 20 boys, how many girls would
sesenic [268]

Answer:

70

Step-by-step explanation:

Since 2:7 is the ratio of boys to girls, that would mean that there are 2 boys to every 7 girls. 2 x 10 is what gets us to 20 and for the ratio part for girls we have to do the same thing; 7 x 10. Now the ratio is 20:70. We can make sure that we are correct by multiplying. 2 can multiply 3.5 times until it gets to 7. So 20 x 3.5 is 70.

5 0
3 years ago
Read 2 more answers
Carlos drove 65 miles to a friend's house in another town. The graph below shows the relationship between the distance he drove
juin [17]

Answer: distance = rate x time d

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
This is the graph of f(x). What is the value of f(3)?
JulijaS [17]

The value of f(3) is 8

3 0
2 years ago
In a certain data distribution, 85 is 0.25 standard deviation above the mean and 50 is 1.5 standard deviations below the mean. W
Oxana [17]

Answer:

The mean is 80 and the standard deviation is 20. Therefore we have

65 is 0.75 standard deviation below the mean.

Step-by-step explanation:

z = \frac{x-\mu}{\sigma}

Since 85 is 0.25 standard deviations above the mean we have

0.25 = \frac{85-\mu}{\sigma} or 0.25·σ  = 85 - μ......1

1.5 = \frac{\mu-50}{\sigma} or 1.5·σ  = μ - 50..............2

From 1 we have σ = 340 - 4·μ substituting into 2 gives

1.5·(340 - 4·μ) =  μ - 50 ⇒ 510 - 6·μ = μ - 50

7·μ = 560 or μ = 80

Therefore σ = 340 - 4·μ = 340 - 4·80 = 20

A value, x, 0.75 standard deviation below the mean is given by

0.75 = \frac{80-x}{20} which gives 15 = 80 - x or

x = 65.

8 0
3 years ago
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