F(x) = |7-x|

Help me pls!​

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

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Use the distributive law to multiply. 3(4x + 5y + 6)