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vazorg [7]
2 years ago
15

A service center charges a fee of x dollars for an oil change plus y dollars per quart of oil used. A sample of its sales record

is shown.
A table shows the oil tank size in quarts and total cost for two customers. Customer A: Oil tank size, 5 quarts. Total cost, 22.45 dollars. Customer B: Oil tank size, 7 quarts. Total cost, 25.45 dollars.

Write a system of linear equations that represents this situation.

Equation for customer A:
____=22.45$

Equation for customer B:
___=25.45$

Question 2
Find the fee and cost per quart of oil.

$ fee?

$ per quart of oil?

Mathematics
1 answer:
igomit [66]2 years ago
5 0

Answer:

  • Fee - $14.95, and $1.5 per quart of oil

Step-by-step explanation:

<u>Equation for customer A:</u>

  • x + 5y =22.45$

<u>Equation for customer B:</u>

  • x + 7y=25.45$

<u>Subtract the first equation from the second and solve for y:</u>

  • x + 7y - x - 5y = 25.45 - 22.45
  • 2y = 3
  • y = 3/2
  • y = 1.5

<u>Find x by substituting the value of y:</u>

  • x + 5*1.5 = 22.45
  • x = 22.45 - 7.5
  • x = 14.95
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SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!
Oduvanchick [21]

Answer:

My Answer: <u>33.95</u>

Step-by-step explanation:

x - 13.75 = 20.2

so because it is subtracting we have to add.

x - 13.75 + 13.75 = 20.2 + 13.75

when added, x will cancel out, and we will be left with the answer.

x = 33.95

GL!

-Oceaniii

3 0
3 years ago
Question 1 (3 points)
Basile [38]

Answer:

The mean is 12, The median is 13, The mode is 14, and the range is 8.

The second choice is the correct answer.

Explanation:

  1. I found the mean by adding up all the numbers and dividing by the number of numbers, or sun divided by count. The sum of the numbers was 132, and the count was 11. I divided 132 by 11 to get 12.
  2. I listed the numbers in order from least to greatest. The data set was: 7, 8, 10, 12, 12, 13, 13, 14, 14, 14, 15
  3. I found the median by crossing off the number on each end of the data set, and kept going. For example, I crossed off 8, and then 15, and then 10, and then 14 and so on until I got to the middle number. (Keep in mind, if there are two middle numbers, find the mean of them [add them and divide by two])
  4. The mode is the number that shows up the most in the data set, so I looked at the data set and saw that 14 showed up 3 times, more times than any other number.
  5. The range is the difference between the greatest and least number (maximum and minimum) so I just subtracted 15 - 7 to get a difference of 8.
6 0
3 years ago
Are these answers correct?
Mars2501 [29]
Very good job! They are all correct and it shows how you got the answer! ^_^ 100%
7 0
3 years ago
Read 2 more answers
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Marina86 [1]
D) 35
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Lines AAA, BBB, and CCC show proportional relationships. Which line has a constant of proportionality between yyy and xxx of \df
Lady_Fox [76]

Answer:

Line B

Step-by-step explanation:

I did the question on Khan

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3 years ago
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