130 divided by 2.5 equals show work

Bring the fraction a/a-4 to a denominator of 16-a^2

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick