Which statements are true about the expression y + 9 1. The letter y is a variable

2. The letter y is a constant

3. The letter y is a term

4. The number 9 is a constant

5. The number 9 is a variable

6. The number 9 is a term

Choose all that apply

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^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?