2x+0.5y = 3
x+2y = 8.5

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Rewrite the following without an exponent. (5/8)-1

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.