Stacked with the multipilcation sign

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

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

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.)