Some please help me my grade is suffering

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

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.)

If the discriminant if a quadratic equation is 4 which statement describes the roots?