Every thing is pretty self explanatory. for 15 have complete sentence ? ? !

9. Let p = Pico

3/4p = 18

10. Let h = height with pedestal and foundation

151 + h = 305

11. Let m = Meredith

19 = 3 + 2m

12. Let p = number of pizzas, $5 off is - 5 from regular price

3p - 5 = 21.75

13. Option C.

14. Option A. 

15. Let w = last week's miles

w = (12) + 3

The word "half" tells you to use 1/2 in the equation. The phrase "three more than" tells you to use + 3. We multiply 1/2 by 12 (or divide 12 by 2; it's the same thing) because we are taking half of the miles Carmen ran "this week" as stated in the problem. 

What are the following algebraic equations. you need to post those if you want the answer