HELP QUICK PLEASE If a trapezoid is 3 inches tall, it's longest base is 8 inches wide, and the area is 21 inches squared, what is the length of the missing base of the trapezoid?

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?