A chemist is mixing a solution that is 2% acid and another solution that is 8% acid. She needs to make 75 ml of a solution that is 5% acid. How much of each solution should she use?

37.5 ml of 2% solution and

37.5 ml of 8% solution

Step-by-step explanation:

x = 2% solution

y = 8% solution

system of equations:

x + y = 75

.02x + .08y = 75(.05)

substitution method:

let y = 75 - x

.02x + .08(75 - x) = 3.75

.02x + 6 - .08x = 3.75

6 - .06x = 3.75

-.06x = -2.25

x = 37.5

y = 75 - 37.5

y = 37.5

3x + 4y -25 =0 represents the amount of change sianna should recieve

a precentage of 6th graders. the population is all 6th graders. let me know if i'm wrong, i hope this ! : )

step-by-step explanation: