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4 years ago

A cable company wants to find out the average number of hours its customers spend watching cable television.

Mathematics

2 answers:

Troyanec [42]4 years ago

3 0

100 of the companies customers chosen from the monthly billing list

patriot [66]4 years ago

3 0

Answer: 100 of the companies customers chosen from the monthly billing list

Step-by-step explanation:

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What is 9/11=?/22 if it was a whole number?

vampirchik [111]

$?=x\\\\\frac{9}{11}=\frac{x}{22}\ \ \ |it's\ a\ proportion\ \ \ |cross\ multiply\\\\11\cdot x=9\cdot22\ \ \ \ |divide\ both\ sides\ by\ 11\\\\x=\frac{9\cdot\not22^2}{\not11_1}\\\\x=\frac{9\cdot2}{1}\\\\\boxed{x=18}
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4 years ago

Read 2 more answers

What is the value of the expression 83?

jarptica [38.1K]

Answer:

83+11_

Step-by-step explanation:

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3 years ago

Write the equation of the line fully simplified slope-intercept form.

zmey [24]

Answer:5y=x-35

Step-by-step explanation:

The given line passes through the points $(0,-7)$ , $(10,-5)$ .

Let the slope of the line be $m$ .

If a line passes through $(x_{1},y_{1})$ and $(x_{2},y_{2})$ ,then

$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

So, $m=\frac{-7-(-5)}{0-10}=\frac{1}{5}$

Y-intercept of a line is defined as the y-coordinate of the point where the line touches y axis.

Let the y intercept be $b$

From the graph, $b=-7$

The equation of the line with slope $m$ and y-intercept $b$ is $y=mx+b$

So, $y=\frac{1}{5}x-7$

$5y=x-35$

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3 years ago

What is 1-2sin^2x=sinx <br> Please show steps and find all solutions in interval [0,2pi)

Svetlanka [38]

Answer:

$\large\boxed{x=\dfrac{3\pi}{2}\ \vee\ x=\dfrac{\pi}{6}\ \vee\ x=\dfrac{5\pi}{6}}$

Step-by-step explanation:

$1-2\sin^2x=\sin x\\\\\text{substitute}\ t=\sin x,\ t\in[-1,\ 1]\\\\1-2t^2=t\qquad\text{subtract t from both sides}\\\\-2t^2-t+1=0\qquad\text{change the signs}\\\\2t^2+t-1=0\\\\2t^2+2t-t-1=0\\\\2t(t+1)-1(t+1)=0\\\\(t+1)(2t-1)=0\iff t+1=0\ \vee\ 2t-1=0\\\\t+1=0\qquad\text{subtract 1 from both sides}\\\boxed{t=-1}\\\\2t-1=0\qquad\text{add 1 to both sides}\\2t=1\qquad\text{divide both sides by 2}\\\boxed{t=\dfrac{1}{2}}$

$\sin x=-1\to x=-\dfrac{\pi}{2}+2k\pi,\ k\in\mathbb{Z}\\\\\sin x=\dfrac{1}{2}\to x=\dfrac{\pi}{6}+2k\pi\ \vee\ x=\dfrac{5\pi}{6}+2k\pi,\ k\in\mathbb{Z}\\\\x\in[0,\ 2\pi)$

$x=-\dfrac{\pi}{2}\notin[0,\ 2\pi)\\\\x=-\dfrac{\pi}{2}+2\pi=\dfrac{3\pi}{2}\in[0,\ 2\pi)\\\\x=-\dfrac{\pi}{2}+4\pi=\dfrac{7\pi}{2}\notin[0,\ 2\pi)\\\\x=\dfrac{\pi}{6}\in[0,\ 2\pi)\\\\x=\dfrac{\pi}{6}+2\pi=\dfrac{13\pi}{6}\notin[0,\ 2\pi)\\\\x=\dfrac{5\pi}{6}\in[0,\ 2\pi)\\\\x=\dfrac{5\pi}{6}+2\pi=\dfrac{17\pi}{6}\notin[0,\ 2\pi)$

4 0

4 years ago

X2 + 3x + 2<br> What is the factor?

musickatia [10]

Answer: (x+1)(x+2)
step by step explanation:

3 0

3 years ago