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stellarik [79]
2 years ago
9

A pipe extends from ground level to a location under the ground. Two-fifths of the way down the pipe, there is a leak. The leak'

s elevation is −6.2 meters.
What is the elevation of the end of the pipe that is under the ground?

Enter your answer as a decimal or as a mixed number in simplest form in the box.
Mathematics
1 answer:
AleksAgata [21]2 years ago
7 0

Answer: -15.5

Step-by-step explanation:

I took the test

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One of the roots of the quadratic equation 4mnx^2 – 6m^2x – 6n^2x + 9mn = 0 (m, n ≠ 0) is a)-3m/2n b)3m/2n c)2m/3n d)-2m/3n
maxonik [38]

Answer:

B.\ \frac{3m}{2n}

Step-by-step explanation:

Given

4mnx^2 - 6m^2x - 6n^2x + 9mn = 0\ (m, n \neq  0)

Required

Calculate one of the root of the equation

4mnx^2 - 6m^2x - 6n^2x + 9mn = 0

Factorize

2mx(2nx - 3m) -3n(2nx - 3m) = 0

(2mx - 3n)(2nx - 3m) = 0

Split equation

2mx - 3n = 0\ or\ 2nx - 3m = 0

Make x the subject of formula in both expressions

2mx = 3n\ or\ 2nx = 3m

x = \frac{3n}{2m}\ or\ x = \frac{3m}{2n}

<em>From the list of given options, one of the roots of the equation is</em> \frac{3m}{2n}

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Do the ratios 18/16 and 3/12 form a proportion?
I am Lyosha [343]

Answer:

No. They are not proportionate.

Step-by-step explanation:

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