Answer:
14
f(x) = 7
-7^2 + 9(7)= -49 + 63 = 14
Answer:
1000
Step-by-step explanation:
Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
Part 1) Find the value of x
we know that
Triangles CDF and FDE are similar
therefore
The ratio of its corresponding sides is proportional and its corresponding angles are congruent
so


Part 2) Find the length of DE

substitute the value of x

Answer: 5 7\8
Step-by-step explanation:
A. Hope this helped im sorry if its wrong