All of the edges of a regular triangular pyramid have length 12. A frustum of the pyramid has height half of that of the pyramid. What is the: a) volume of the frustum? b) surface area of the frustum?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Which number line represents the solution set for the inequality -1/2x> 24?

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?