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konstantin123 [22]
3 years ago
14

Find the equation of the lines through the origin and at right angle to lines x^2-5xy+4y^2​

Mathematics
1 answer:
dezoksy [38]3 years ago
7 0

Answer:

x^2-5xy+4y^2

x^2-2+3+4y^2

x=1

again

x=5

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I need help finding the y-intercept of these, I am no good with slope and tables. ;-;
zubka84 [21]

Answer:

1. -4

2. 6

3. -6

(i hope this is right •_•)

Step-by-step explanation:

<u>First table</u>

When the x coordinate is 0, that point is your y intercept. For the first one, your y intercept is -4.

<u>Second table</u>

For the second one, we need to do a bit of counting. We can see the x coordinates go before and after zero, but the table does not show us 0. So, we're going to have to calculate the slope. Bear with me here, I'm a little tired and this might be rambling ;-;

So, the formula for calculating slope is \frac{y_{2} -y_{1}}{x_{2}-x_{1}}. I'm going to use those first two points to get my slope. We're going to say the first point is point 1 and the second point is point 2 (genius, i know lol). So, let's substitute in the x and y values.

\frac{9-12}{-3-(-6)}

And simplify...

\frac{-3}{3}

So, your slope is -1. We can use that. We just have to count down.

If the x is -2, the y is 8. If the x is -1, the y is 7. And if the x is 0....(drumroll please) the y is 6! So, your y intercept is 6.

<u>Third table</u>

Now, this table isn't very nice either and doesn't have an x as 0 for us. Hmpf. But we can still do what we did above. I'll just skip the explanation and you can observe my steps.

\frac{-3-(-5)}{9-3}

\frac{2}{6}

\frac{1}{3}

Let's count down....

If x = 3, y = -5

If x = 2, y = -5 1/3

If x = 1, y = -5 2/3

If x = 0, y = -6

8 0
3 years ago
CAN SOMEONE HELP ME WITH THIS PROBLEM
Aliun [14]
Sorry I can’t buddy........................................................:(
4 0
3 years ago
Read 2 more answers
Order -4,9 -7 -10, and -3 from least to greatest.
vovikov84 [41]

Answer:

-10,-7,-4,-3,9

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
1) 13 + 3W - 9 + 16w
nevsk [136]

Answer:

4+19W

Step-by-step explanation:

You would just simplify the terms, 13-9=4 and 3W+16W=19W

5 0
3 years ago
Read 2 more answers
Find the surface area of the closed hemisphere
V125BC [204]
Diameter = 8 yards so the Radius = 4 yards:

 Area of a sphere = 4π.R² and hemisphere = 2π.R²

Area of hemisphere = 2.π.(4)² = 32.π
But note we didn't calculate yet the are that closes this hemisphere:
Area of the cicle = π.R² = π.(4)² = 16.π, so the surface area of the hemisphere is 32π + 16π = 48.π (Or =150.8 yard²)
8 0
3 years ago
Read 2 more answers
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