What will it cost to carpet a rectangular room measuring 15 ft by 21 ft if the carpet costs $22.50 per square foot?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Find the domain of the following expression: 1/(√x)-2

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.