Help&EXPLAIN

Don’t use for points or will be reported and I’ll take the points back

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

X+y=-4 x-y=2 use elimination with adding and subtraction

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.