Write an equation in slope intercept form that passes through (2,1) and is perpendicular to (5x+y=9)

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

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?