Answer:
A. -11x + 7y
Step-by-step explanation:
4y - 9x + 3y - 2x
4y + 3y = 7y
-9x - 2x = -11x
-11x + 7y
I hope this helps!
Answer:
81
Step-by-step explanation:
9 x 9 = 81
So, 81 is the perfect square.
No, 11/5 simplified is 2 1/5 so it is in between 2 and 3
Set up an equation to solve for the tax rate, x:

We can conclude that the tax rate on the computer was 6.5 percent.
Solution
For this case we can create the following schema
We can use the definition of distance:
x= vt
We can find the relative velocity:

And the distance between both is required to be 2 mi so then we can find the time like this:

Then the answer is:
1 hr