Multiply 80 by the decimal version of the percentage, .085, to get the tax of $6.8. Then add 6.8 to 80 and get the final price of the shoes $86.80
Answer: I believe that the answer is B. F(x) = x^2 - 9 / 7x
Answer:
x is a variable to fill in something that is unknown. its like a question mark
Step-by-step explanation:
Answer:
Is their a picture so we can see where to put it
First, factor out a 3.
3(x² - 9)
In any quadratic ax² + bx + c, we can split the bx term up into two new terms which we want to equal the product of a and c.
In this case, we have x² + 0x - 9. (the 0x is a placeholder)
We want two numbers that add to 0 and multiply to get -9.
Obviously, these numbers are 3 and -3.
Now we have 3(x² + 3x - 3x - 9).
Let's factor.
3(x(x+3)-3(x+3))
<u>3(x-3)(x+3)</u>
There are multiple shortcuts which you could make here, FYI:
Instead of splitting the middle, if your a value is 1, you can go straight to that step (x+number)(x+other number).
Whenever you have a difference of squares, like a²-b², that factors to (a+b)(a-b).
