Each marble bag sold by maya's marble company contains 5 yellow marbles for every 3 red marbles. if a bag has 40 yellow marbles, how many red marbles does it contain

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.

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?