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slavikrds [6]
3 years ago
8

Between 2000 and 2010, the percentage of U.S. Households with cordless phones increased by 13.7% to 91%. What percentage of hous

eholds had cordless phones in 2000?
Mathematics
1 answer:
alina1380 [7]3 years ago
6 0

Answer:

80%

Step-by-step explanation:

1.137x = 91 \\ x = 80.03518029

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Suppose the line of best fit is being found for some data points that have an r-value of 0.657. If the standard deviation of the
oksian1 [2.3K]
We are given a line with the following data:

r-value = 0.657 (r)
standard deviation of x-coordinates = 2.445 (Sx)
standard deviation of y-coordinates = 9.902 (Sy)

We are asked to find the slope of the line up to 3 decimal places.

To find the slope of the line, based on the data that we have, we can use this formula:

slope, b = r * (Sy / Sx) 

substitute the values to the formula:

b = 0.657 * ( 9.902 / 2.445 )

Solve for the b.

Therefore, the slope of the line is 

b = 2.66078, round off to three decimal places:

b = 2.661 is the slope of the line. 
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3 years ago
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15y^-11/3y^-11, show steps I need help please don't understand how to do it.
tester [92]
One may note, you never quite asked anything per se, ahemm, if you meant simplification.

\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
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a^{{{  n}}}\implies \cfrac{1}{a^{-{{  n}}}}\\\\
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\cfrac{15y^{-11}}{3y^{-11}}\implies \cfrac{15}{3}\cdot \cfrac{y^{-11}}{y^{-11}}\implies 5\cdot y^{-11}\cdot y^{+11}\implies 5\cdot y^{-11+11}
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8 0
4 years ago
two sides of a triangle have the same length. the third side measures 6 m less than twice the common length. the perimeter of th
Y_Kistochka [10]

Let x be the length of the two sides that are the same.

Then the third side would be 2x -3.

The perimeter of the triangle will come from adding all of the sides together and setting it equal to the value given, 13.

That is,

x + x + (2x - 3) = 13

-- > 4x - 3 =13

-- > 4x = 16

-- > x = 4.

As for the answer, the question was cut short, but with x=4,,

the length of each of the common sides is 4, making the third side 5, to get a total perimeter of 13.

<h3>What are two sides of a triangle?</h3>

The hypotenuse of a right-angled triangle is its longest side, the base is its lower side, and the perpendicular, which stands next to the right angle, is its standing line.

You may determine the sides of a right-angled triangle using a number of techniques, such as the Pythagoras theorem or the triangle's perimeter.

To learn more about sides of a triangle visit:

brainly.com/question/16986516

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5 0
2 years ago
A certain pizza parlor has 7<br> different toppings. How many two-<br> topping pizzas are possible?
Elina [12.6K]

Answer:

jnrdmsx,

Step-by-step explanation:

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Which of the follow expressions are equivalent to (3^4)^-2 • (3^5)^3
Fiesta28 [93]

Answer:

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Step-by-step explanation:

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3 years ago
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