Calvin was earning $40 an hour giving basketball lessons but decided to lower his price to $35 what percent did he decrease his price

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

How do you solve a question like this?

Which graph represents the function g(x) = |x + 4| + 2?