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2 years ago

If x is a non-zero number and n is an integer, then x^-n is the reciprocal of x^n True or False

Mathematics

2 answers:

enyata [817]2 years ago

8 0

I would go with TeriWeaver's answer

Paul [167]2 years ago

7 0

The answer i believe is false

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the pitch, or frequency, of a vibrating string varies directly with the square root of the tension. if a string vibrates at a fr

Naily [24]

$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\begin{array}{llll}
\stackrel{frequency}{f}\textit{ of a vibrating string varies directly}\\
\qquad \qquad \textit{with the square root of the tension }\stackrel{tension}{t}
\end{array}$

$\bf f=k\sqrt{t}\quad \textit{we also know that }
\begin{cases}
f=300\\
t=8
\end{cases}\implies 300=k\sqrt{8}
\\\\\\
\cfrac{300}{\sqrt{8}}=k\implies \cfrac{300}{\sqrt{2^2\cdot 2}}=k\implies \cfrac{300}{2\sqrt{2}}=k\implies \cfrac{150}{\sqrt{2}}=k
\\\\\\
\textit{and we can \underline{rationalize} it to }\cfrac{150\sqrt{2}}{2}\implies 75\sqrt{2}=k$

$\bf thus\qquad f=\stackrel{k}{75\sqrt{2}}\sqrt{t}\implies \boxed{f=75\sqrt{2t}}\\\\
-------------------------------\\\\
\textit{now, when t = 72, what is \underline{f}?}\qquad f=75\sqrt{2(72)}$

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3 years ago

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What is the measure of angle DCR

PIT_PIT [208]

Answer:

Angle DCF is equal to 125 degrees.

Step-by-step explanation:

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3 years ago

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PHOTO ADDED PLEASE HELP

asambeis [7]

Exact form: 10/9 decimal form: 1.111 mixed number form: 1 1/9

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2 years ago

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What is the value of the equation -2/3x + 9 = 4/3 x -3?

MArishka [77]

Answer:

x = 6

Step-by-step explanation:

$\frac{-2}{3}x+9=\frac{4}{3}x-3\\\\\frac{-2}{3}x-\frac{4}{3}=-3-9\\\\\frac{-2-4}{3}x= - 12\\\\\frac{-6}{3}x = -12\\\\ -2x -12\\\\x = \frac{-12}{-2}\\\\x = 6$

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2 years ago

At a wildlife preserve,

kakasveta [241]

Answer:

you have to add the numbers . when ever there is a total that means to add

Step-by-step explanation:

13+14=27

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3 years ago

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