Can anyone help me with this? 5+5 equals?

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

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

Explain how you do each step what term makes it inconsistent y=2x - 4 ?