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Ksivusya [100]
3 years ago
14

Martha finds that her watch gains 2 minutes in 6 hours. how much will it gain in 19.5 hours? a 0.615 minutes b 1.625 minutes c 6

.5 minutes d 58.5 minutes
Mathematics
1 answer:
docker41 [41]3 years ago
4 0
6 hours gain 2 mins
19.5 hours gain x mins

6x = 19.5 \times 2 \\ 6x = 39 \\ x = 6.5

Answer is C. 6.5 minutes

Hope this helps you. - M
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What is true about the solution of x^2/2x-6=9/6x-18?
pogonyaev

Answer:

  • x = ±√3, and they are actual solutions
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Step-by-step explanation:

The method often recommended for solving an equation of this sort is to multiply by the product of the denominators, then solve the resulting polynomial equation. When you do that, you get ...

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Alternatively, you can subtract the right side of the equation and collect terms to get ...

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So, the actual solutions are x = ±3, and x = 3 is an extraneous solution. The value x=3 is actually excluded from the domain of the original equation, because the equation is undefined at that point.

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<em>Comment on the graph</em>

For the graph, we have rewritten the equation so it is of the form f(x)=0. The graphing program is able to highlight zero crossings, so this is a convenient form. When the equation is multiplied as described above, the resulting cubic has an extra zero-crossing at x=3 (blue curve). This is the extraneous solution.

7 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Csqrt%7B-4%7D%20%7D%7B%283%2B1%29-%282%2B3i%29%7D%20" id="TexFormula1" title
frozen [14]
\sqrt{-4} can also be written as 2i 
where i = √-1

\frac{2i}{4-2-3i} =  \frac{2i}{2-3i}

Rationalizing denominator,

\frac{2i(2+3i)}{(2-3i)(2+3i)} =  \frac{4i-6}{4+9} =  \frac{4i-6}{13}
8 0
3 years ago
which is the rationalized form of the expression the square root of x divided by the square root of x +the square root of 7
Ilya [14]

Answer:

I assume your goal is to rationalize the denominator -

So you need to multiply the denominator by its conjugate.

So we have:

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->

\frac{x-\sqrt{7}\sqrt{x} }{x-7}

gg

8 0
3 years ago
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