Jenny drew a figure in art class. does it have rotational symmetry? if yes, what is the angle of rotation.

write and solve the system of equations for the situation.

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

It says factor each expression completely 8y+48

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup