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morpeh [17]
3 years ago
6

There are 100 sophomores at the school. 85% of them are good students. What would be the percent of good students at school if (

rounding the answer to the nearest whole number):
ten “F” students were to join this school
Mathematics
1 answer:
klemol [59]3 years ago
7 0

Answer:

77%

Step-by-step explanation:

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8 0
2 years ago
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Novosadov [1.4K]
General\ equation\ for\ line\ in\ slope\ intercept\ form:\\\\y=ax+b\\\\To\ find\ a\ and\ b\ substitude\ points\ (-7,5)\ (-4,1)\ into\ equation\\\\ &#10;\left \{ {{5=-7a+b}\ \ \ \ \atop {1=-4a+b\ |*-1}} \right.\\\\ \left \{ {{5=-7a+b}\ \ \ \ \atop {-1=4a-b}} \right.\\\\&#10;+----\\\\Addition\ method\\\\&#10;4=-3a\ \ |:(-3)\\\\&#10;a=-\frac{4}{3}\\\\&#10;b=5+7a=5+7*(-\frac{4}{3})=5-\frac{28}{3}=-4\frac{1}{3}\\\&#10;Answer\ y=-\frac{4}{3}x-4\frac{1}{3}\\\\&#10;Checking\ solution:\\&#10;y-5=-\frac{4}{3}(x+7)&#10;y-5=-\frac{4}{3}x-\frac{28}{3}\\\\&#10;y=-\frac{4}{3}x-\frac{28}{3}+5\\\\&#10;y=-\frac{4}{3}x-4\frac{1}{3}\\\\Answer:B \ and\ D.
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