Ack pls halp me so i can take winter break off
giving out a truckload of points

The sum of two numbers is 86, and their difference is 20. find the two numbers

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?