If a plane can travel 490 miles per hour with the wind and 390 miles per hour against the wind, find the speed of the wind and the speed of the plane in still air.

Select the quadratic that has root x = 8 and x = -5

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.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39