Simplify the following expression 1+30/5•3
plsss

Can someone me out here and the tell me the greatest common factor

What statement is true? 2x^2-9x+2=-1

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?