The width of a rectangle is 3 m less than the length. The area is 21 m². Find the width and the length. ​

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

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

17 in long 1.3 ft wide and 8in high what is the volume