11 - 3m (replace m with 2)

11 - 6
5
The answer is
A. 5
We want to make their denominators the same to add them, their common denominator is 16
So 5/8 will become 10/16
now we can add both fractions easily
10/16 + 1/16 = 11/16
The volume is 130*100*24=312 000 ft^3
The cost is 0,37 *312000=115 440 $
There are 36 handshakes all together.
I hope this helps you.
Have a great day!
Set it up as an equation. So 48-x=4x-7. 48=5x-7. 55=5x and x =11.