Let E be the midpoint of segment DF. If DE = 22 cm, what must be the length of DF?

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters