How much did a Connor start with?

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?