Answer:
69
Step-by-step explanation:
Mean: add A1+A2+A3+A4+……..+An then divide by 2 means 8+5+7+10+15+21=66/2=33
Step-by-step explanation:
if I understand correctly, then the function is
t(x) = 8x
now we know, that for a specific n
t(n) = 200
that means
200 = 8n
n = 200/8 = 25
the function tells us, that for 25 trucks we need 200 tires.
21-25 is -4. Is this helpful?