Choose the correct formula for combination.
A . n!/r!(n-r)!
B. n!/(n-r)!

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?

The area of each triangle is 7 square units. the surface area of the triangular prism is

Ken leaves work 20 minutes late. he decides to make up time by taking the toll road instead of side streets. he can travel three times faster by taking the toll road. create an equation to represent his total travel time, including wait time, where x is the number of minutes the drive was expected to take