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Leto [7]
3 years ago
5

What is the solution to the system of equations? 5x-3y=-9 2x-5y=4 (___,___)

Mathematics
1 answer:
djverab [1.8K]3 years ago
4 0
\left \{ {{5x-3y=-9\ \ | *(-2)} \atop {2x-5y=4\ \ | *5}} \right. \\\\ \left \{ {{-10x+6y=18} \atop {10x-25y=20}} \right. \\\\+---\\addition\ method\\\\
-19y=38\ \ \ | divide\ by\ -19\\
y=-2\\\\2x=4+5y\ \ \ | divide\ by\ 2\\\\
x=\frac{4+5y}{2}=\frac{4+5*(-2)}{2}=\frac{4-10}{2}=\frac{-6}{2}=-3\\\\Solution:\\ \left \{ {{y=-2} \atop {x=-3}} \right.
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The LinReg line of best fit for this data set is ŷ = -1.24X + 0.66

<h3>What is regression line?</h3>

A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable.

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(−5, 6.3),

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