Elizabeth is returning to the United States from Canada. She changes the remaining 300 Canadian dollars she has to $250 US dollars. What was $1 US dollar worth in Canadian dollars?

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

I’m stuck on this equation, anyone got the answer?

X+y=-4 x-y=2 use elimination with adding and subtraction