Remember d=rt
so its 3.5=r(0.5)
divide 3.5 by 0.5, which is 7. His rate is 7 miles per hour.
Answer:
c = 38b
Step-by-step explanation:
b = number of boxes
c = total number of cookies.
It is given to you that there are 38 cookies per box. The given equation means that The total number of cookies can be found by multiplying the amount of cookies per box with the amount of boxes in all.
c = 38b is your answer.
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To the nearest percentage point, what percentage of students who play a sport don’t play a musical instrument?
First, using the information given, fill out the chart with the rest of the data (in the image attached)
Then find the number of students who play a sport and don’t play a musical instrument, which in the chart is 11
Place 11 over the total: 
and convert to a percentage:
44%
I am assuming that the cost of an oil change already includes the mark-up.
So, 18 is 175%. 18 ÷ 1.75 = 10.29 is the original cost.
10.29 * 3/4 = 30.87/4 = 7.71 mark-up
10.29 + 7.71 = 18
Or if 18 is the basis of the mark-up, then,
18 * 3/4 = 54/4 = 13.50 mark-up
18 + 13.50 = 31.50 new cost of an oil change
