In the lab, maria has two solutions that contain alcohol and is mixing them with each other. she uses 3 times as much solution a as solution b. solution a is 17% alcohol and solution b is 20% alcohol. how many milliliters of solution b does she use, if the resulting mixture has 213 milliliters of pure alcohol?

the answer is 53.35 ml of solution B

Working - there are 4 parts in total (1 part solution B and 3 parts solution A)

therefore 213 divide 4 = 53.24 ml

Check - 53.25 x 1 = 53.25

and 53.25 x 3 = 159.75

Add 53.25 and 159.75 = 213

the answer is thin because within context, the stanza concludes the and frail tone the people have toward each other, and the fact that it would be thin, makes the most sense compared to "pliable" or "not hard or firm to the touch". hope this , good luck.

step-by-step explanation:

can i have brainliest

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