Let x=number 1 let y=number2
there sum is equal to 70
then
number1+number2=70
substituting
x+y=70
y=70-x
let there product will be p
p=xy
substituting
p=x(70-x)
which is choice c
D=dollars earned
T=time spent painting the fence.
(1,5) (2,10) (3,15)
D=5T
6/10 x 10/1
6 x 10 = 60
10 x 1 = 10
60/10 = 6
1/2 x 10/1
1 x 10 = 10
2 x 1 = 2
10/2 = 5
3/4 x 20/1
3 x 20 = 60
4 x 1 = 4
60/4 = 15
