Answer:
6 mm
Step-by-step explanation:
Use the Pythagorean Theorem to solve for the unknown leg

Since we need to solve for a, we will manipulate the equation in terms of b and c → 
Here, b = 7 mm and c =
mm
Plugging these numbers into our equation gives us
→
=
= 6 mm
Answer:
Step-by-step explanation:
I think it is D but I am not sure
A. +27
B. +4
C.+21
A. -16
B. 23
C. 3
D. -70
E. -20