Help plz. I give brainliest. NO LINK PLZ​

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?