Answer:
8.5
Step-by-step explanation:
BF * EF = CF * DF
7 * 17 = CF * 14
119 = CF * 14
CF = 119 / 14
CF = 8.5
1/3
-33
2(-2)^3 -7(-2)^2 -5(-2) +1
-16 -28 +11
= -33