Please help PLEASE! Consider the following pair of equations:

y = x + 4
y = −2x − 2

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form. (5 points)

(-2,2)

Step-by-step explanation:

Substitute answer for y in first equation (y=x + 4) into y of second equation

x+4=-2x-2

3x=-6

x=-2

put value of x (-2) into either equation to solve for y

y=x+4

y=-2+4

y=2

or y=-2x-2

y=-2(-2)-2

y=4-2

y=2

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,