Solve the system of equations using substitution.

-1

Step-by-step explanation:

set them equal to each other because they are both equal to y

subtract 2x from both sides

-10 = 2x - 8

add 8 to both sides

-2 = 2x

divide both sides by 2

-1

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,

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2