George was able to solve 36 math problems in 15 minutes. urban was able to solve 42 math problems in 20 minutes. who was able to solve math problems at a greater rate? what was the rate?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x