2x to the second power + 2 + 9x to the second power

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

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

15/16 as a decimal rounded to the nearest hundredth