Answer:

Step-by-step explanation:
First, we have to write 8 + x, but since it's half of that we write it as a fraction with a 2 on the bottom to halve it.
Answer:
232
Step-by-step explanation:
all u gotta do here is plug in 40 here so:
0.145(40)x^2
0.145(1600)
f(x)= 232
8= 1 minute so you do 8x5 because he runs 5 miles and your answer will be C=40 minutes. Hope this help :)
Answer:
..............I think its wrong .......