Acleaning solution that is 40% nitric acid is being mixed with a solution that is 15% nitric acid in order to create 2 l of a solution that is 25% nitric acid. how much 40%-acid and how much 15%- acid should be used?

answer: 40.95

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!

47

step-by-step explanation: