A cleaning crew always uses a 10% disinfectant solution on very delicate surfaces. But today, the crew only has a 50% disinfectant solution. If the crew needs 25 liters of 10% solution, how many liters of water and how many liters of the 50% disinfectant should they mix?

step-by-step explanation:

oh the deck is the size of my dic k so about 320 inches hope u get my dic k as the answer

you a real one for tat answer

step-by-step explanation:

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81