3x - 7y = -28 for y do i solve this equation differently than any other one?

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.

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=