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4 years ago

I need help and i would appreciate it and can you explain (That's if you can explain)

Mathematics

1 answer:

Finger [1]4 years ago

6 0

Answer:

x=-2

y=-3

Step-by-step explanation:

-9x+4y = 6

9x+5y = -33

We will add these together to eliminate x

-9x+4y = 6

9x+5y = -33

----------------

0x +9y =- 27

9y = -27

Divide by 9

9y/9 = -27/9

y =-3

We still need to find x

9x +5y = -33

9x +5(-3) = -33

9x-15 = -33

Add 15 from each side

9x+15-15 =-33+15

9x=-18

Divide by 9

9x/9 = -18/9

x = -2

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Answer:

$y=\frac{1}{3}x-\frac{16}{3}$

Step-by-step explanation:

Arranging the given equation in slope-intercept form ( y = mx + b ):

$y+1=-3(x-5)\\y+1=-3x+15\\y=-3x+15-1\\y=-3x+14$

We know that the perpendicular line would have a slope (m) that is negative reciprocal of this ( $\frac{1}{3}$ ). Thus we can write the perpendicular line's equation as $y=\frac{1}{3}x+b$ .

Now putting x = 4 and y = -6 into the equation, we can solve for b:

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3 years ago

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2 years ago

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2 years ago

If side A is twice as long as B and C is 25 using the Pythagorean Theorem,What are the lengths of side A and B? Round to the nea

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Answer:

The lengths of side A is 22.4 and B is 11.9.

Step-by-step explanation:

Given:

If side A is twice as long as B and C is 25 using the Pythagorean Theorem.

Now, to find the lengths of side A and B.

Let the side B be $x.$

So, the side A be $2x.$

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Now, to solve by using Pythagorean Theorem:

A² + B² = C²

$(2x)^2+(x)^2=(25)^2$

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