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4 years ago

Just need help finding X and Y

Mathematics

1 answer:

Lapatulllka [165]4 years ago

5 0

Answer:

Step-by-step explanation:

For x use the Pythagorean theorem:

$x^2+6^2=10^2$

$x^2+36=100$ <em>subtract 36 from both sides</em>

$x^2=64\to x=\sqrt{64}\\\\x=8$

We know: x + y = 20. Substitute:

$8+y=20$ <em>subtract 8 from both sides</em>

$y=12$

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Step-by-step explanation:

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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dimaraw [331]

Answer:

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Step-by-step explanation:

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3 years ago

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Makovka662 [10]

Answer:

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Step-by-step explanation:

The "substitution method" for solving a system of equations requires that you write an expression that can be substituted for a variable in one or more of the other equations in the system.

<h3>Expression to substitute</h3>

The given equations are ...

y = x -8
2x +3y = 1

We notice the first equation gives an expression for y. This is exactly what we want to substitute for y in the second equation.

<h3>Substitution</h3>

When the expression (x-8) is substituted for y in the second equation, you get ...

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<h3>Solution</h3>

This 2-step equation can now be solved in the usual way:

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Note that we now know what the correct answer choice is.

Using the expression for y, we find ...

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The attached graph confirms this solution.

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marishachu [46]

Answer:

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