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
42.5
3.2
-------
45.7
If you want me to fully exsplain just tell me
Answer:
c = -3 F(x) = -3x+5
Step-by-step explanation:
Hey there!
"A number" is referred to an unknown number so we can say it is labled as

"Increased" means you're going up/ adding
ten = 10
150 stays the same
"Ten times a number" =

"Increased by 150" =

Thus your answer should look like this:

Good luck on your assignment and enjoy your day!
~

Answer:
B.
Step-by-step explanation:
4*s = 4s
4*3 = 12
Use the property of distribution
<em>hope this helps :)</em>