Answer:
DE=5*8=40
Step-by-step explanation:
DE+EF=DF
5x+17x-20=20x-4
22x-20=20x-4
22x-20x=-4+20
2x=16
x=16/2
x=8
DE=5x
DE=5*8=40
Answer:
10
Step-by-step explanation:
its 5+5
It’s C because it’s less than 3
Answer:54
Step-by-step explanation:
72 classes in one year
75% spent outside
72x0.75=54