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zmey [24]
2 years ago
15

-2x + 6y = 6 -7x + 8y = -5

Mathematics
1 answer:
AleksandrR [38]2 years ago
4 0

Answer:

x=-2\\y=2

Step-by-step explanation:

-2x+6y=6\\-7x+8y=-5

Let's multiply the first equation by 7 and the second equation by -2

(7)(-2x+6y=6)\\(-2)(-7x+8y=-5)

-14x+42y=42\\14x-16y=10

Now add them together. In this step, x is eliminated.

26y=52

Divide by 26.

y=\frac{52}{26}\\ y=2

Now plug this into any of the two equations to find x.

-2x+6y=6\\-2x+6(2)=6\\-2x+12=16\\-2x=16-12\\-2x=4\\x=\frac{4}{-2}\\ x=-2

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Find the distance between each pair of points. Round your answer to the nearest tenth, if necessary. Hint: Use the Pythagorean T
Paul [167]

The distance between two points on the plane is given by the formula below

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Therefore, in our case,

A=(-1,-3),B=(5,2)

Thus,

\begin{gathered} \Rightarrow d(A,B)=\sqrt[]{(-1-5)^2+(-3-2)^2}=\sqrt[]{6^2+5^2}=\sqrt[]{36+25}=\sqrt[]{61} \\ \Rightarrow d(A,B)=\sqrt[]{61} \end{gathered}

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In general,

-(-n)=n

Remember that

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6 0
1 year ago
I REALLY NEED HELP, ILL MEDAL!!!!
lara31 [8.8K]
Well, first of all, the first statement  (ABC = ADC) looks like it just says
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The effect of the dilation is that all the DIMENSIONS of the square
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Then, when you multiply (length x width) to get the area, you'd have

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and that's
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Here's an easy, useful factoid to memorize:

-- Dilate a line (1 dimension) by 'x' times . . . multiply the length by  x¹

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_______________________________

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2 years ago
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