:( PLEASE HELP ME

A mad scientist mixes Solution A and Solution B to create Solution C.
Solution C is 90 ml in volume and 40% acid (by volume).
Solution A is 20% acid.
Solution B is 50% acid.
How much of each solution is needed to create the final mixture C? Which system of linear equations would you use to set up the problem? Solve the system afterwards.

A. A + B = 90
.2A + .5B = .4(90)

B. A+B = 90
.2A + .5B = .4

C. A + B = 36
.5A + .2B = .4

D. A + B = .4 (90)
.2A + .5B = .4( 90)

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

you need to upload the picture of the circle.

step-by-step explanation: