Please help fast! I will give brainliest to first correct answer!

Add.
(2x^2+6x=1)+(-7x^2+2x-3)

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

How far could you drive on 50 gallons of gas