Pls help so confusing don't understand!!!'

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?

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?