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grigory [225]
3 years ago
14

What is the slope of (8,5) and (-9,5)

Mathematics
2 answers:
kodGreya [7K]3 years ago
8 0
Slope =\frac{y_2-y_1}{x_2-x_1}\\\\= \frac{5-5}{8-(-9)}\\\\=\frac{0}{8+9}\\\\=\frac{0}{17}\\\\=\boxed{\bf{0}}

The slope is 0.
3241004551 [841]3 years ago
3 0
(8,5)
(-9,5)
=
0/17
Answer is Zero
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A) Solve 3(x - 5) = 18
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URGENT! (Grades close tomorrow and turning this in will boost my grade from a B to an A in College Algebra. I can't figure these
zvonat [6]

Answer:

  24.  see below for a drawing with axis intercepts labeled

  30.  the plane is parallel to the y-z plane. It is "x=4". The only axis intercept is (4, 0, 0).

Step-by-step explanation:

24. The axis intercepts are fairly easily found. You can do it a couple of ways.

<u>first way</u>

  • Set other variables to zero and divide by the coefficient of the variable of interest.

For 3x +5y +15z = 15, the x-intercept can be found by setting y and z to zero. This gives ...

  3x = 15

so, dividing by 3 tells you the x-intercept is ...

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Likewise, the y- and z-intercepts are, respectively, ...

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So, the points where the plane crosses the axes are ...

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__

<u>second way</u>

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Doing that gives ...

\dfrac{3x+5y+15z}{15}=1\\\\\dfrac{x}{5}+\dfrac{y}{3}+\dfrac{z}{1}=1

The denominators are the corresponding intercepts. (This is called the "intercept form" of the equation of the plane.)

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Actually, the math for these two methods is virtually identical. The second way does it "all at once", so can take fewer steps. Effectively, you're doing the math of the "first way" and expressing the result in the denominator.

__

Please note that when a variable is missing, there is no intercept for that axis. That is, the plane is parallel to that axis. (In problem 30, for example, the y- and z-variables are missing. The plane x=4 is parallel to the y- and z-axes (the y-z plane).)

_____

In the first attached drawing, the x-axis is red, the y-axis is green, and the z-axis is blue. The labeling of the points is difficult to see, but the axes are a different (lighter) color behind the plane than in front of it. This plane forms a triangle in the first octant (x, y, z > 0).

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3-D graph paper (isometric graph paper) grids are available with a web search. Such might make it easier to draw the planes you need to draw. (See the third attachment for one example.)

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ivolga24 [154]
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