Answer: b is the correct answer
Step-by-step explanation:
I did the quiz and it was right
Answer: −10
Step-by-step explanation: 9^2−21/−6
81−21/−6
60/−6
−10
Answer: 225 a^2 b^2
first you’d work within the parentheses and multiply 5 by 3, after that you square everything (multiply everything by itself)
Use this and put in 8 for r 
26.24
Answer:
66.46
Step-by-step explanation: