The vertex of this parabola is at (2, -1). when the y-value is 0, the x-value is 5. what is the coefficient of the squared term in the parabola's equation?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(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?

Ineed ! what is the connection between ratios, fractions, and percents? give an example with your answer.