Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9? x + 2y = 21 a. 4x + 6y = 64 b. 2x + y = 36 c. 4x + y = 21 d. -3x + 4y = 33 e. 3x + 2y = 28

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

The area of square garden is 300m squared. how long is the diagonal?

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?