The diagram shows the number of students in a year group that are female (SetA) and the number of left handed students in the same year group (Set B) How many students in the Venn diagram are not left handed

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).