Substitution:
X + 2y = 13
-2x - 3y = -18

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Sketch one cycle if the cosine function y=2cos2theta