Answer:
43% of the students prefer biology
Step-by-step explanation:
Among girls:
39 of the students are girls.
21 of the girls like biology best.
Boys:
100 - 39 = 61 are boys.
16 prefer physics
11 out of the 34 who prefer chemistry are girls, so 34 - 11 = 23 are boys.
61 - (16 + 23) = 22 prefer biology.
What percentage of the students prefer biology?
21 boys and 22 boys, that is, 43 students out of 100. So
43*100%/100 = 43%
43% of the students prefer biology
The answer is C. ............
Answer:
Subtraction.
Step-by-step explanation:
We have been given an expression: 
.
Simplify our given expression:
Subtract 4 from both sides of equation:
Divide both sides of equation by 10:
Therefore, the missing reason for the shown argument is subtraction.
54 minutes. .....................
Well.. General form is Ax+by+c=0
So this is not in general form
