Does (–1, 3) make the equation y = 7 true?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?