#13-8: write an equivalent expression for 3(3a-2)+4-a and simplify it. evaluate the expression if a=-2.

Distribute the to the .

Move the common terms next to each other.

Combine the variables.

Combine the constants.

Substitute in the variable.

Multiply.

Subtract.

you can't solve x because it is 2 linear equation and you only have one equation

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,