Question

How much pure antifreeze must be added to 12 gallons of 20% antifreeze to make a 40% antifreeze solution?

Answer 1

12(.40-.20)/(1-.20) ... maybe?

Answer 2

these are the options : A.
2 gallons
B.
8 gallons
C.
4 gallons
D.
6 gallons

Answer 3

gonna have to review my thoughts on that one :)

Answer 4

a(1) + 12(.20) = (12+a)(.40)

a(1) + 12(.20) = 12(.40)+a(.40)

a(1-.40) = 12(.40-.20)

a = 12(.40-.20)/(1-.40) ... I was thiiiisssss close lol

Answer 5

so whats the answer?

Answer 6

im gonna assume your smart enough to actually pick up at least a calculator and enter the numbers ...

Answer 7

4 gallons

Answer 8

lol. ok thanks