Answer:
therefore cost of Gina's sandwich is $3.25
The plane's airspeed is 140:)
<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>
Its called a octagon, hope that helps