Ashopkeeper calculates that the tax on a pair of sunglasses is $2.185. what is the tax rounded to the nearest penny

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

If the discriminant if a quadratic equation is 4 which statement describes the roots?