Find an ordered pair to represent a in the equation à = 2b + c if b=(6,3) and c=(-4,8)

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

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?

Gables properties corp. is leasing office building with an area of 49b^2+70b+25. what is the shape of the building? a) rectangle b) square