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stich3 [128]
2 years ago
10

2x + 4y-31=123 what is the equation for x and then y​

Mathematics
1 answer:
UNO [17]2 years ago
6 0

Answer:

i would say

y = ( 77 - x ) / 2

Step-by-step explanation:

2x + 4y = 123 + 31

2x +4y = 154

4y = 154 -2x

y = ( 154 - 2x ) / 4

y = ( 77 - x ) / 2

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Triangle ABC has vertices A(-3,0) B(0,6) C(4,6). Find the equations of the three medians of triangle ABC
Mariana [72]

Answer:

1.y=-6x+6, y=\frac{6}{5} x+\frac{18}{5}, y=\frac{6}{11} x+\frac{42}{11}

2.y=-\frac{1}{2} x+2\frac{1}{4} , x=2, y=-\frac{7}{6}x+\frac{43}{12}

Step-by-step explanation:

A(−3, 0), B(0, 6), and C(4, 6)

using the midpoint formula: (\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}) we can find all of their midpoint which is necessary to complete question 1 and 2

Mid AB=(-1.5, 3), Mid BC=(2, 6), Mid AC=(0.5,3)

Next, we have to find the slope of from the vertex and the midpoint of each side. We use the slope formula: \frac{y_2-y_1}{x_2-x_1}.

You would get -6, 6/5, and 6/11.

Next you substitute in the coordinates for the equation of each for example: y=-6x, you switch in the set of cords AB which is (-1.5, 3). 3=-6(-1.5)+z and find that z=6, so the equation is y=-6x+6. As for the rest, repeat the same process until you find all 3 cords. You should get an answer of y=-6x+6, y=\frac{6}{5} x+\frac{18}{5}, y=\frac{6}{11} x+\frac{42}{11}

For question 2,

The line has to be perpendicular bisector to the midpoint, signifying that it has to split 2 angles into congruent angles and a side into half. In order to do that we need to first find the opposite reciprocal of each side's slope. Which means we need to once again use the slope formula and get the opposite reciprocal by -\frac{1}{slope}. For all the opposite reciprocal slopes you get will be incorporated into the final formulas. That gives us the slopes of -1/2, 0 and -7/6. Then do the same process of matching cords with these incomplete equations and you can find the final equations of y=-\frac{1}{2} x+2\frac{1}{4} , x=2, y=-\frac{7}{6}x+\frac{43}{12}

I hope that helped with your question!! :)

Also I'm an RSM student too and I didn't know how to do them before so I searched it up.

6 0
2 years ago
Create a number line
wel

Step-by-step explanation:

is it correct ?? think that d answer is helpful to u

4 0
3 years ago
Find x round to the nearest tenth! please help!!! more trigonometry!​
hoa [83]

Answer:

<h2>x = 437.3 ft</h2>

Step-by-step explanation:

Look at the picture.

Use cosine:

cosine=\dfrac{adjacent}{hypotenuse}

We have a measure of the angle and length of the hypotenuse:

\alpha=29^o,\ hypotenuse=500\ ft

\cos29^o\approx0.87461

Substitute:

\dfrac{y}{500}=0.87461                 <em>multiply both sides by 500</em>

y=437.305\to y\approx437.3

6 0
3 years ago
(Click on the pictures for the question)
harkovskaia [24]

Answer:

1. -1,1  -2,2  -3,3.     2. when we are digging and when we are planting something.     3. Zero is the center point in the negitives, It tells you when you are about to hit negitives or positives.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A cylindrical water tower has a height of 6 ft and a radius of 4 ft. How much water does the tower contain when it is 1/3 full?
viktelen [127]
V = pi r^2 h
But it says 1/3 full so
1/3 pi r^2 h
1/3 * 3.14 * 4^2 * 6
100.48ft cubed
Whichrounds off to 100.5
4 0
3 years ago
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