A set of two concentric circles is shown above. What is the area of the shaded portion above?

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64