Question

A 20% acid solution is mixed with a 70% acid solution to get 50 liters of a 40% solution.

Which of the following expressions is equal to 4(50)?

Answer 1

What are the expressions?

Answer 2

0.2x + 0.7y
2x + 7y
x + y

Answer 3

ive never really understood these types of problems before

Answer 4

@hihihii

Answer 5

please help me

Answer 6

x = liters of 20% acid solution
y = liters of 70% solution

Total liters: x + y = 50
Total Percent of acid solution after combining: .20x + .70y = .40(50)

Solve the system