Shawna can swim 3 laps in the pool in 7 minutes. at this rate, how long will it take her to swim 15 laps?

1. are the triangles similar and if so why? what is the value of x? show your work.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?