Marie mixes 16 liters of 18% acid solution with a 27% acid solution which results in 21% acid solution. let x represent the number of liters of 27% solution used. which equation can be used to find the number of liters of 27% acid solution in the mixture? a. 2.88+0.21x=0.27(x+16) b. 2.88+0.27x=0.21(x+16) c. 4.32+0.21x=0.27(x+16) d. 3.36+0.27x=0.18(x+16)

Okay, because 18% of 16 is 2.88, we can cross off C. and D. as an option.

Now, because it is a 27% acid solution of an unknown amount, B. is not correct because it says 0.21x, rather than 0.27x. Knowing this, we can safely say that The answer is Option A

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is