How many solutions does the system have? x−3y=7 −2x+6y=6

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

In angle pqr find the measure of

Write an expression that represent sarah’s total pay last week.represent her hourly wage with w monday 5 tuesday 3 wednesday 0 noah hours wednesday 8 only with w wage did noah and sarah earn the same amount last week?