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3 years ago

PLEASE HELP WILL BE MARK BRAINLIEST!

Mathematics

1 answer:

NemiM [27]3 years ago

6 0

Answer:

(2,-4)

Step-by-step explanation:

Since you are reflecting over the y axis, the x value is going to change. when you reflect something it becomes the opposite, and the opposite of -2 is 2. We don't change the y-value because we are reflecting on the y-axis. So the answer is (2,-4)

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What the volume of this tank is?

Veronika [31]

Answer:

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Step-by-step explanation:

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3 years ago

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A. y = 8 − 7x<br> B. y = 7x + 8<br> C. y = 7x − 8<br> D. y = 8x − 7

Anna71 [15]

Answer:

I'm getting

y=-7x+8

The 7 is negative for me..You should maybe try yourself too and see what you get I might have made a mistake

Step-by-step explanation:

I'm guessing you live somewhere in the U.S. so I'll use the equation you use there

Equation:

$y = mx + b$

$m = \frac{y1 - y2}{x1 - x2}$

first pick two points

I'll pick (0,8) and (1,1)

$m = \frac{8 - 1}{0 - 1} = \frac{7}{ - 1 } = - 7$

this means that the slope is -7

So far the equation will look like this

$y = - 7x + b$

to get b pick one point, I'll pick (0,8) and replace y and x

$8 = - 7 \times 0 + b$

when you solve this you'll get b

$b = 8$

So the equation will look this

$y = - 7x + 8$

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3 years ago

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4 years ago

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A Pythagorean triple is a triple of natural numbers satisfying the equation a^2+b^2+c^2.

Softa [21]

X, x+2 - two consecutive odd or even numbers
Add the reciprocals of these numbers.
$\frac{1}{x}+\frac{1}{x+2}=\frac{x+2}{x(x+2)}+\frac{x}{x(x+2)}=\frac{x+2+x}{x^2+2x}=\frac{2x+2}{x^2+2x}
$

Now add the squares of the numerator and denominator, as in the example.
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So this number has to be a perfect square.
$x^4+4x^3+8x^2+8x+4= \\
x^4+2x^3+2x^2+2x^3+4x^2+4x+2x^2+4x+4= \\
x^2(x^2+2x+2)+2x(x^2+2x+2)+2(x^2+2x+2)= \\
(x^2+2x+2)(x^2+2x+2)= \\
(x^2+2x+2)^2$
It is a perfect square, so this method always works.

The numbers $2x+2, \ x^2+2x, \ (x^2+2x+2)^2$ are a Pythagorean triple for any $x \in \mathbb{N^+}$ .

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dsp73

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