The sum of measures of angles A and B is 90°
Hence the angles are complementary
- As complementary angles have sum 90°
For the numeric part, you'll have to find the GCD of 15 and 25, which is 5. So, we can factor a 5 and we have

As for the literal part, you can factor
because it's the power of s with the smallest denominator. So, we have

B: -8
8 times 1 = 8, and since there is a negative in front of the 1 when you are multiplying, it should be -8/
6.28 because pi x diameter = circumference.
( diameter = half of a circle)
Step-by-step explanation: