Wai keong's monthly salary is twice the amount he save in April he save $3500 in April. In may, he saved $4200 less than the amount he spent. How much is his monthly salary? How much did he save in may?

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?

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.

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?