What's the answers I'm insanely bad at reorganizing the y=mx+b equations (Possibly a brainliest if I learn a lot)

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost