Due in 5m! and 30 points

simplify: 9(a + b) + 4(3a + 2b)
a) 13a 13b
b) 21a + 17b
c) 21a + 2b
d) 38ab

Which is a graph of a proportional relationship?

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319