2x +2y<18 how can I solve this equation and graph it.

What are the sotions to the quadratic equation 9x^2=4

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.

A+b= 17, ab=70, find the value of |a-b|