Te average = Amount/total quantity:
Proceed the division of x^4 − x^3 − 24 by x+2
The result is = x³-3x²+6x-12
80% mean 80/100=8/10=4/5
4/5 of 40=4/5 times 40/1=160/5=32
answer is 32 quetsions
easier way
10% times 8=80%
10% of 40=4
4 times 8=32
Length=3*width
area=12
3W*W=12
w^2=4
w=2
l=6
perimeter=2(l+w)
=2(2+6)
=16
