<u>Answer:</u>
The answer is B --> ![\frac{x^{2} }{3x^{2} -1}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E%7B2%7D%20%7D%7B3x%5E%7B2%7D%20-1%7D)
<u>How I got that:</u>
<u />
These are really easy, you're simply looking for numbers that you can factor down. Like here:
I took:
![\frac{4x^{2} }{12x^{2} -4}](https://tex.z-dn.net/?f=%5Cfrac%7B4x%5E%7B2%7D%20%7D%7B12x%5E%7B2%7D%20-4%7D)
and saw that I could factor out 4 from the denominator:
![\frac{4x^{2} }{4(3x^{2} -1)}](https://tex.z-dn.net/?f=%5Cfrac%7B4x%5E%7B2%7D%20%7D%7B4%283x%5E%7B2%7D%20-1%29%7D)
and then I canceled out the common factor (4 because its on both sides):
![\frac{x^{2} }{3x^{2} -1}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E%7B2%7D%20%7D%7B3x%5E%7B2%7D%20-1%7D)
And there ya go!
<em>~That's All Folks~</em>
<em>-Siascon</em>
Answer:
![A= \frac{400}{21} B=\frac{580}{21}](https://tex.z-dn.net/?f=A%3D%20%5Cfrac%7B400%7D%7B21%7D%20B%3D%5Cfrac%7B580%7D%7B21%7D)
Step-by-step explanation:
You just have to remember the rules of the triangles in order to be able to solve this:
The rule of trigonometry that you will have to use is a is similie to 20, B is simile to 29 and 20 is 20.
So you would have to put them like this:
![\frac{21}{20}= \frac{20}{a}= \frac{29}{b}](https://tex.z-dn.net/?f=%5Cfrac%7B21%7D%7B20%7D%3D%20%5Cfrac%7B20%7D%7Ba%7D%3D%20%5Cfrac%7B29%7D%7Bb%7D)
You just have to clear the equations for A and B:
![a=\frac{20*20}{21}=\frac{400}{21}\\ b=\frac{29*20}{21} =\frac{580}{21}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B20%2A20%7D%7B21%7D%3D%5Cfrac%7B400%7D%7B21%7D%5C%5C%20%20b%3D%5Cfrac%7B29%2A20%7D%7B21%7D%20%3D%5Cfrac%7B580%7D%7B21%7D)
So that would be your answer.
Answer:
I think is -8x-4 let me know if im right
Step-by-step explanation:
Answer:
7 books
Step-by-step explanation:
make an equation
x = # of books each book is $4 so its 4x
the shipping fee no matter how many books he buys will be $2 so it's just 2
the equation looks like this:
4x + 2 = 30
we set equal to 30 cuz he can't spend more than $30
solve for x
4x = 30 -2
4x = 28
x = 7
Brett can buy no more than 7 books.
Answer:
Step-by-step explanation: