Answer:
We start with the equation:
A: 3*(x + 2) = 18
And we want to construct equation B:
B: X + 2 = 18
where I suppose that X is different than x.
Because in both equations the right side is the same thing, then the left side also should be the same thing, this means that:
3*(x + 2) = X + 2
Now we can isolate the variable x.
(x + 2) = (X + 2)/3
x = (X + 2)/3 - 2
Then we need to replace x by (X + 2)/3 - 2 in equation A, and we will get equation B.
Let's do it:
A: 3*(x + 2) = 18
Now we can replace x by = (X + 2)/3 - 2
3*( (X + 2)/3 - 2 + 2) = 18
3*( (X + 2)/3 ) = 18
3*(X + 2)/3 = 18
(X + 2) = 18
Which is equation B.
We start off with 100 dollars. Which in this case Eliza deposits 25 every month.
What is average rate of change?
It is a measure of how much the function changed per unit, on average, over that interval
So this meaning that
25x + 100 would be are main focus here.
Replace x with 2 since we are finding the change of the 2nd account
25(2) + 100 = 150
Do the same problem but replace x with 10
25(10) + 100 = 350 dollars
So the average rate of change would be 25 dollars
:)
