Unit #2 – Lesson #4 Exit Ticket: Justify each step in the equation solution below with either a property of real numbers (associative, commutative, distributive) or a property of equality (addition or multiplication)
5(x+2) = 30
Step 1: 5x+10=30
Justification:
Justification:
Step 2: 5x+10+-10 = 30 +-10
5x = 20
Step 3
Justification:
5x 20
5 5
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?