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Iteru [2.4K]
3 years ago
8

What is the solution for this proportion?

Mathematics
1 answer:
uranmaximum [27]3 years ago
3 0

Answer:

n = -3

Step-by-step explanation:

Cross multiply.  We get:

(n - 6)(3n + 1) = 3n(n - 5), or

3n² + n - 18n - 6 = 3n² - 15n

Simpify by combining like terms.  3n² on the left is the same as 3n² on the right, so we cancel these terms:

n - 18n - 6 = - 15n.

Continuing to combine like terms, we get:

-2n = 6, so that n = -3.

Note that there is no problem subbing -3 for n in the given proportion; both fractions will be defined.  Thus, n = -3 is the solution desired.

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The perimeter of a rectangle is 24 in. and its length l l is 3 times the width w w . what is the length and width \left(l,w\righ
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Tim mowed lawns for 2 hours and earned $7.50 per hour. Then he washed windows for 4 hours and earned $6.30 per hour. What were T
sergij07 [2.7K]

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Step-by-step explanation:

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7 0
3 years ago
Which expression is equivalent to x2(3x3−2x)−(−7x3+2) ? 3x5+5x3−2 3x5−9x3+2 3x5+7x3−2x+2 3x6+7x3−2x2−2
erik [133]

Answer:

The equivalent expression is 3x^5-9x^3-2

Step-by-step explanation:

To find the equivalent expression, we need to

open up the brackets;

Thus;

x^2(3x^3 -2x) - (7x^3 + 2)

= 3x^5 -2x^3 -7x^3 -2

= 3x^5 -9x^3-2

6 0
3 years ago
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OLEGan [10]

Answer:

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Step-by-step explanation:

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15 and 16th items are in the range 20 to 30, so the median is between 20 to 30

20 <h<30

3 0
3 years ago
Read 2 more answers
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