Answer:
10. I can not answer this one without knowing the values of ax, bx and c. It's probably written on the previous question.
11. I can not answer this one without knowing the answer on the previous number.
12. C
Area = lw
70 = (3 + w)w
70 = w² + 3w
0 = w² + 3w - 70
0 = (w + 10) (w - 7)
l = -10, w = 7
since measurements can not be negative, we will change the sign to positive.
l = 10, w = 7
Checking:
70 = (3 + 7)7
70 = (10)7
70 = 70
13. A
14. B
15. C
