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3 years ago

13x+2y=1 5x−2y=−19 x= y=

1 answer:

6 0

$+\underline{\left\{\begin{array}{ccc}13x+2y=1\\5x-2y=-19\end{array}\right}\ \ \ |\text{add both sides of equations}\\.\ \ \ \ \ 18x=-18\ \ \ \ |:18\\.\ \ \ \ \ \ x=-1\\\\\text{substitute the value of x to the first equation}\\\\13(-1)+2y=1\\-13+2y=1\ \ \ \ |+13\\2y=14\ \ \ \ |:2\\y=7\\\\\text{Answer:}\ \left \{ {{x=-1} \atop {y=7}} \right.$

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2 years ago

The population of Farmersville can be modeled by the inequality y > 2,000x + 2,100, where x is the number of years since 2010

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Step-by-step explanation:

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The inequality for the population of Farmsville in x years after 2010 is given by:

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2012 is 2012-2010 = 2 years after 2010, so we have to find y(2).

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