Answer: 8
Step-by-step explanation: That digit above the 2 is a exponent. It represents the number of times 2 is multiplying itself. This is simply 2x2x2. 2x2x2=4x2=8
Answer: 45
Step-by-step explanation:
60 minus 15 equals 45( there is 45 girls)
Write the equations:
8x-10y=20
-7x+10y=20
Add them using elimination
x=40
Now solve for y
8(40)-10y=20
10y=300
y=30
So there you have it: x=40, y=30.