we know B is the midpoint, thus it cuts AC into two equal halves.
![\bf \underset{\textit{\Large 8x - 20}}{\boxed{A}\stackrel{3x-1}{\rule[0.35em]{10em}{0.25pt}} B\stackrel{3x-1}{\rule[0.35em]{10em}{0.25pt}}\boxed{C}} \\\\\\ (3x-1)+(3x-1) = 8x-20\implies 6x-2=8x-20\implies -2=2x-20 \\\\\\ 18=2x\implies \cfrac{18}{2}=x\implies \blacktriangleright 9=x \blacktriangleleft \\\\\\ BC=3x-1\implies BC=3(9)-1\implies \blacktriangleright BC=26 \blacktriangleleft](https://tex.z-dn.net/?f=%5Cbf%20%5Cunderset%7B%5Ctextit%7B%5CLarge%208x%20-%2020%7D%7D%7B%5Cboxed%7BA%7D%5Cstackrel%7B3x-1%7D%7B%5Crule%5B0.35em%5D%7B10em%7D%7B0.25pt%7D%7D%20B%5Cstackrel%7B3x-1%7D%7B%5Crule%5B0.35em%5D%7B10em%7D%7B0.25pt%7D%7D%5Cboxed%7BC%7D%7D%20%5C%5C%5C%5C%5C%5C%20%283x-1%29%2B%283x-1%29%20%3D%208x-20%5Cimplies%206x-2%3D8x-20%5Cimplies%20-2%3D2x-20%20%5C%5C%5C%5C%5C%5C%2018%3D2x%5Cimplies%20%5Ccfrac%7B18%7D%7B2%7D%3Dx%5Cimplies%20%5Cblacktriangleright%209%3Dx%20%5Cblacktriangleleft%20%5C%5C%5C%5C%5C%5C%20BC%3D3x-1%5Cimplies%20BC%3D3%289%29-1%5Cimplies%20%5Cblacktriangleright%20BC%3D26%20%5Cblacktriangleleft)
Total number of pairs = 24 pairs.
Total cost of 24 pairs = $800 approximately.
Cost of each pair = 
Plugging values in the above formula, we get
Cost of each pair = 
If we divide 800 by 24, we get 33.33 approximately.
But in the given problem, estimated cost is given $28 per pair.
If we subtract 33.33-28, we get $5.33.
So, the estimated cost is $5.33 each pair less than the actual cost of each pair.
Therefore, $28 per pair is not a good estimate of the price.
Answer:
If there are 54 cars, that would mean about 18 would be red.
Answer:
x²y² - z²
Step-by-step explanation:
Note that
(xy + z)(xy - z) are the factors of a difference of squares
a² - b² = (a + b)(a - b)
here a = xy and b = z, thus
(xy + z)(xy - z) = (xy)² - z² = x²y² - z²