Answer:
n=4
Step-by-step explanation:
Answer:
x = 10
Step-by-step explanation:
To find x, write a proportion between the side lengths for the similar triangles in the figure.

To solve, cross multiply and isolate x.
(x+5)(12) = 18(x)
12x + 60 = 18x
60 = 6x
10 = x
Answer: If you are wondering about your grades, it becomes 70.495. Therefore, your grade becomes a 70.