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3 years ago

14

What is the solution to the system of equations below?

1 answer:

Natali [406]3 years ago

6 0

$\left\{\begin{array}{ccc}y=-3x+5\\y=4x-2\end{array}\right\Rightarrow4x-2=-3x+5\\\\4x-2=-3x+5\ \ \ |+2\\\\4x=-3x+7\ \ \ |+3x\\\\7x=7\ \ \ \ |:7\\\boxed{x=1}\\\text{substitute the value of x to the first equation}\\y=-3(1)+5=-3+5=2\to\boxed{y=2}\\\\Answer:\ x=1;\ y=2\to(1;\ 2)$

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Anna weighs 52 pounds. Patrick weighs x pounds. Write an expression for their combined weight.

Vladimir79 [104]

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2 years ago

The sum of two numbers is 12. One number is prime and the other is composite. What are the numbers?

kompoz [17]

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3 years ago

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What is the answer to 6(1+8n)=-39+3n

MissTica

For this case we must simplify the following expression:

$6 (1 + 8n) = - 39 + 3n$

We apply distributive property on the left side of the equation:

$6 * 1 + 6 * 8n = -39 + 3n\\6 + 48n = -39 + 3n$

We subtract 3n from both sides of the equation:

$6 + 48n-3n = -39\\6 + 45n = -39$

We subtract 6 from both sides of the equation:

$45n = -39-6\\45n = -45$

We divide between 45 on both sides of the equation:

$n = \frac {-45} {45}\\n = -1$

Answer:

$n = -1$

5 0

3 years ago

What is x? x + 5 = 9. Pretty easy points to score.

lisabon 2012 [21]

X+5=9
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2 years ago

What’s the answer to this help

Y_Kistochka [10]

You can buy 25 cans of oil
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3 years ago

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