These numbers are "a" and "b".
Sum is 64, so
a+b=64
Difference is 42 so
a-b=42
So you've got:

When a+b=64 and a=53 you've got:
53+b=64
b=11
So these numbers is 53 and 11.
Answer:
Step-by-step explanation:
Each of the following 17 is 17 more than its corresponding integer in the 1st 17.
---> 306 + 289 = <em>595</em>
Answer:
a. $60
b. it doesn't show how much Mark makes on here so I can't give an answer