You sign up for 13 weeks of swim lessons. the total cost is 325$. what is the cost per week?

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319