Find the point-slope equation of the line containing (-2, -3) and having a slope m=4

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?