Answer:
C.
Step-by-step explanation:
Step-by-step explanation: To solve this proportion for n, we can use cross products.
Image provided.
F=m+25
m+f=139, using f from above we have:
m+(m+25)=139
2m+25=139
2m=114
m=57, and since f=m+25
f=82
So there are 57 males and 82 females.
Distribute the negative sign to the 4x and 11 making it 3x+5y-4-4x-11 and combine like terms