Answer:36
Step-by-step explanation:

for every 7 students there are 4 girls, so for every 84 there must be 48
7*12=84
4*12=48
so, in all 84 students there are 48 girls
so amount of boys=84-48=36
there are 36 boys
Answer:

Step-by-step explanation:
To find the answer we have to first group the like terms:

therefore

so

4/5 of 40 = 32
1/3 of 3 = 1
1/3 of 15 muffins = 10 muffins
I believe the answer is B: 3 + 7 + (-10).