PLS OMG HELP ME ITS DUE SOON im gonna cry if no one helps, ive been posting these questions all day and no ones actually answering ahauhaiuhshsksjs bye ill just fail

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

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

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a