HELP DUE AT 11 -2v + v = 3

What’s the ratio in simplest form if you count 14 robins out of 150 birds

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15