How do i solve: 15 - w/4 = 28 (this is 2 step equations)

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below.the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

Me. i can't figure out this question. give an explanation too. .

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)