The width of a rectangle is 9 feet less than the length. The area is 580 square feet. Find the length and width of the rectangle.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.