Jill had a certain amount of money. she spent 15$ downloading new songs. she has 2/5 of the original amount left. how much money did she have originally?

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =