No, she multiplied the exponents instead of adding them.
Answer:
15 1/12 feet
Step-by-step explanation:
Well if he descended 8 1/3 feet below the water, that means he must've went from board to water which is 6 3/4 feet then down 8 1/3 feet
6 3/4 + 8 1/3
= 6 9/12 + 8 4/12
=15 1/12 feet
5a – 7b + b2 <span>for a = –1 and b = 5.
5(-1) - 7(5) +5^2
= -5 - 35 + 25
= -40 + 25
= -15</span>