Both of the problems equal 600
Answer:
60 -047 = 13 in²
Step-by-step explanation:
Paper area: 6 x 10 = 60
15 circles, each circle has diameter: 6 /3 or 10 /5 = 2
each circle area: πr² = 3.14 x 1² = 3.14
15 circles: 3.14 x 15 = 47.1
paper wasted: 60 - 47.1 ≈ 13 in²
Answer:
10 years
40 years
Step-by-step explanation:
let present ag e of son=x
5 years ago age of son=x-5
5 years ago age of man=7(x-5)=7x-35
present age of man=7x-35+5=7x-30
after 5 years
age of son=x+5
age of man=7x-30+5=7x-25
also 7x-25=3(x+5)
7x-25=3x+15
7x-3x=15+25
4x=40
x=10
age of son=10 years
age of man=7*10-30=70-30=40 years