Statistics:
a person's standardized test score on a test is given by the function z(x) = x-25/40, where x is the actual score on the test.
a) if the person's actual score was 600, what is the standardized score?
b) find the inverse of z(x)
c) using the inverse, if the person's standardized score was 2.5, what was the person's actual score on the test?

your work:
a)

b) step 1: switch the x & y
step 2: solve for y

c)

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.

How do you determine whether a relationship represented as as graph is linear or nonlinear

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up