Find any three solutions to the system: x−3y=5 3x−9y=15

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.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Which of the following represents the factorization of the trinomial below? x^2+7x-30