PLEASE SOMEONE HELP solve the equations using substitution method and SHOW YOUR WORK
A. y = 2x + 1
5x + y = 15

B. y = x + 7
4x + 3y = -7

C. y = 1
6x - 8y = 28

D. 2x - 3y = 16
4x + y = 4

Infinity Many Solutions

- Harvard university professor

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.