Answer:
I'm not sure I get the question.
Step-by-step explanation:
x + y = ???
I don't know what your questions means.
Maybe more context?
Suppose x quarts of the 50% solution
0.5x+0.2*20=0.4(x+20)
0.5x+4=0.4x+8
0.1x=4
x=40
Haoyu, I'm telling Ms. Mak about your behavior. Expect not to see tomorrow, you were cheating on the math test. I will also contact your parents. Reply to me immidetly if you do not want to get exposed to everyone.
The answer is 75%. To find this answer, you add 57 and 19 to get the total workers which is 76. Then, you find the percentage of 57 out of 76. 57 divided by 76 is .75, bu to get the percent, you have to move the decimal two places to the right.
55%. 40-18=22 and 22 of 40 is 55%
