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valkas [14]
3 years ago
12

How to solve 8/x^2-1=6/x+1

Mathematics
1 answer:
NARA [144]3 years ago
8 0
You first need to cross multiply to get 8x+8=6x^2-6. Then make the function into 6x^2-8x-14=0 which can be simplified into 3x^2-4x-7=0 by dividing the equation by 2. Then you must split the middle(-4x) to get 3x^2+3x-7x-7=0. This simplifies to 3x(x+1)-7(x+1)=0 and then to (3x-7)(x+1)=0. From here you just solve for each root which you will find are x= -1 and 7/3
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A parabola can be represented by the equation x2 = 2y. What are the coordinates of the focus and the equation of the directrix?
SOVA2 [1]
The standard equation for a parabola that opens upward parallel to the y-axis is x2=4ay, where a = distance from the vertex to focus. Vertex is at origin(0,0)
4a=2
a=2/4
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the coordinate of the focus is (0, 1/2)
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5 0
3 years ago
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Answer:

See Below

Step-by-step explanation:

1) 180 ft / 6 sec

To find a unit rate, you need to have a denominator of 1 and to to do that, you can divide the numerator and denominator by the same number, in this case: 6.

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2) 86 mi / 5 hr

Same as above^(except dividing by 5)

17.2 mi / 1 hr

3) 83 mi / 5 hr

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We can rewrite this as: 16.6 mph

4) 93 mi / 5 hr

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18.6 mi / 1 hr

5) 150 mi / 4 hr

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37.5 mi / 1 hr

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8 0
3 years ago
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What is the soulution of -(-5-6x) = 4(5x+3)?
Fynjy0 [20]
You have to distribute the parentheses first. Since there is a negative sign in front of the parentheses, it counts as a negative 1. After you distribute you should get: -5+6x=20x+12, but that is not your final answer. After you add like terms: 17x=-17. Divide 17 on both sides: x=-1. X=-1 is your final answer.
4 0
3 years ago
A TV that usually sells for $187.57 is on sale for 15% off. If sales tax on the TV is 7%, what is the price of the TV, including
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Answer:

I hope this helpfull.

Step-by-step explanation:

<em>B</em><em>u</em><em>t</em><em> </em><em>i</em><em>f</em><em> </em><em>i</em><em>t</em><em> </em><em>n</em><em>o</em><em>t</em><em>,</em><em>i</em><em>m</em><em> </em><em>s</em><em>o</em><em> </em><em>s</em><em>o</em><em>r</em><em>r</em><em>y</em>

8 0
2 years ago
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Answer:

994

Step-by-step explanation:

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3 0
3 years ago
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