x = liters of 40% solution
y = liters of 70% solution
Gabe needs 30 liters, so
x + y = 30
Each liter of 40% solution contributes 0.4x liter of acid; each liter of 70% solution contributes 0.7y liter of acid. Gabe needs a solution with concentration 60%, which from 30 liters amounts to a net volume of 0.6*30 = 18 liters of acid. So
0.4x + 0.7y = 18
Solve the system however you like. By substitution, we have
y = 30 - x
0.4x + 0.7(30 - x) = 18
0.4x + 21 - 0.7x = 18
3 = 0.3x
==> x = 10 ==> y = 20
Answer:
it is 2/3
Step-by-step explanation
i can't explain it to you
Answer:
320 sq.feet
Step-by-step explanation:
1 inch* 4= 4 feet
4 inches*4= 16 feet
5 inches*4= 20 feet
16*20= 320 sq.feet
Well look I really don’t know have a good day hope you do good on remember god loves you and have ahold day
