You find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42.
a. Write an equation you can use to find the sales tax rate which is r. what is the equation so I tried all things I could think of but it doesn't work like 42=40+r
I got the Answer as 40+40r
40=40+40r
If you have big ideas it is 40+40r
Answer: 42=40+40r
Answer= 42=40r+40
r=5%