How are the numbers 21 and 2,100 alike?

A number that has only 2 factors

10. What's the area of the room in this diagram? 12 feet 13 feet

Lisha is making headbands using ribbon. she would like to make 12 head bands. Each one requires 15.5 inches of ribbon.

Valentina purchased 200 beads for $48 to make necklaces. If she needs to buy 25 more beads, how much would she pay if she is charged the same rate? And How much would it cost if she wants 6 beads

If f (x) = 4x - 3 and g (x) = x + 4, find (f - g) (x).

Solve the differential equation by variation of parameters, subject to the initial conditions y (0) = 1, y' (0) = 0. 9y'' - y = xex/3

Joey rolls a regular number cube. What's the chance he rolls an even number? Record your answer as a simplified fraction using "/" as your fraction key.

You are playing a game and it is your turn to spin the spinner shown. There are four possible results: blue, green, yellow, or purple. What is the probability that you land on purple?

seventy percent of the 100 students in a middle school cafeteria bought their lunch. Some of the students that bought their lunch leave the cafeteria to attend an assembly. Now only 60% of the remaining students bought their lunch.

Before his basketball game, Jessie is responsible for cleaning the visiting teams team's half of the court. Three of his teammates are responsible for cleaning the home teams half of the court.