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crimeas [40]
2 years ago
10

- If 2x2 + 8y = 121.5 and x2 - 8y = 121.5, then x = 9 6.36 16 7

Mathematics
1 answer:
Natalija [7]2 years ago
4 0

Step-by-step explanation:

2x² + 8y = 121.5

x² - 8y = 121.5

Add the equations together to eliminate the y terms.

3x² = 243

x² = 81

x = 9

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The total length of two ribbons is 13 meters. If one ribbion is 7 5/8 meters long what is the length of the other ribbon
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Perhaps the easiest way to solve this problem is to convert 13 into a fraction that has the same denominator as 7 5/8.
Convert both to improper fractions:
7 5/8 turns into 61/8, and
13 turns into 104/8.

Then, subtract 61/8 from 104/8:
104/8-61/8=43/8.
Simplify (mixed fraction):
5 3/8.

The second ribbon has a length of 5 3/8 meters.

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1 year ago
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Point I is on line segment H J ‾ HJ . Given H I = 2 x , HI=2x, H J = 4 x , HJ=4x, and I J = 4 x − 10 , IJ=4x−10, determine the n
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Answer:

<h3>10</h3>

Step-by-step explanation:

If point I is on the line segment HJ, then HI+IJ = HJ

Given the parameters

H I = 2 x

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IJ=4x−10

Substituting the given parameters into the formula;

2x+4x-10 = 4x

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collect like terms

6x-4x = 10

2x = 10

divide both sides b 2;

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Answer:

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Step-by-step explanation:

Consider the provided equation.

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As the above equation is formed by perfect square trinomial so simply applying the square root property as shown:

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Isolate the variable x.

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Linear inequality is the answer to the question
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