Achef needs to cook 16 potatoes. he has already cooked 7.if each potato takes 5 minutes to cook, how long will it take him to cook the rest? plz !

Can someone answer these problems for me

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?

Evaluate the expression. (9 + 5)(3 + 2)0