Answer:
Each kid will get 2.5 submarine sandwiches
Step-by-step explanation:
The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

Rounded to nearest tenth gives:
x = 23 hours
7, 4/11, 7.362, 147/20, 7.99
Answer:
Just one of the ones in the numerator and the one in the denominator
Step-by-step explanation: