Find the surface area of a cylinder with a diameter of 2cm and a height of 9cm​

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

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 difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.