rumour says that if you eat a dog you become a billionaire but if you eat a cat you become poor

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

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?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.