if a trader buys x calculators(all alike) for 6720 naira. write down the cost of one calculator in terms of x​

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Given that abcd is a rhombus, what is the value of x?

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?