Answer:
He answered 0.4 questions per minute.
Step-by-step explanation:
We divide 18 problems by the 45 minutes and get 0.4.
The answer is 0.4 or 2/5
See the picture please
yes
Answer: (a) 43 (b) 25.5 (c) 17.5
<u>Step-by-step explanation:</u>
f(x) = 51
Replace f(x) with 51
a) f(x) - 8 = 51 - 8 = 43