Sam predicted that he would sell 15 mugs, but he actually sold 20 mugs. which expression would find the percent error

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5

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?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?