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4 years ago

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Mathematics

2 answers:

Lostsunrise [7]4 years ago

8 0

It's addition. You add 2 every time. 2,4,6,8,10,10, etc

Nookie1986 [14]4 years ago

6 0

Addition. It's simply adding 2 to each number.

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A box is 70 cm long. Which of these is the closets to the length of this box in feet?

SpyIntel [72]

Answer:

Step-by-step explanation:

do 70m to feet and round

8 0

3 years ago

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Bicycling World, a magazine devoted to cycling, reviews hundreds of bicycles throughout the year. Its Road-Race category contain

sweet [91]

Answer:

Check the explanation

Step-by-step explanation:

$S_{yy}=\sum y^{2}-\frac{\left (\sum y \right )^{2}}{n}=52120800$

$S_{xx}=\sum x^{2}-\frac{\left (\sum x \right )^{2}}{n}=21.74$

$S_{xy}=\sum xy-\frac{\left (\sum x \right )\left (\sum y \right )}{n}=-31284$

Slope of the regression equation is

$b_{1}=\frac{S_{xy}}{S_{xx}}=-1439.01$

and intercept of the equation will be

$b_{0}=\frac{1}{n}(\sum y - b_{1} \sum x)=28818.00$

So the regression equation will be

y'=28818.00-1439.01x

the attached images below comprise of the output of the regression analysis generated by excel:

Intercept:

Hypotheses are:

$H_{0}:\beta_{0}=0,H_{a}:\beta_{0}\neq 0$

t-value of intercept is 8.820

P-value is 0.0000

Since p-value is less than 0.05 so intercept is significant to the model.

Slope:

Hypotheses are:

$H_{0}:\beta_{1}=0,H_{a}:\beta_{1}\neq 0$

t-value of intercept is -7.12

P-value is 0.0000

Since p-value is less than 0.05 so slope is significant to the model.

Since from regression output R-square is 0.864 so 86.4% of the variation in the prices of the bicycles is accounted for by the weight of bicycles.

For X= 15 estimated y value is

y'=28818.00-1439.01*15 = 7232.85

hence, required predicted price is $7232.85.

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4 years ago

Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has tr

frutty [35]

Answer:

36 miles

Explanation:

Let's go ahead sketch the given problem as shown below;

From the above diagram, we can go ahead and determine x, which is the distance the eastbound plane has traveled, using the Pythagorean theorem;

$\begin{gathered} 39^2=x^2+15^2 \\ 1521=x^2+225 \\ x^2=1521-225 \\ x=\sqrt[]{1296} \\ x=36\text{miles} \end{gathered}$

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1 year ago

Please help with the difference between irrationals and rationals. It's a little confusing to me.

astra-53 [7]

Answer:

Rational Number is defined as the number which can be written in a ratio of two integers. An irrational number is a number which cannot be expressed in a ratio of two integers. In rational numbers, both numerator and denominator are whole numbers, where the denominator is not equal to zero.

step-by-step explanation:

3 0

3 years ago

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Please help!! and please show the work and the answer!!

kumpel [21]

Company 1: (24 + 26 + 28 + 23 + 21) / 5 (this is how many numbers added together) = 24.4

Company 2: (6 + 32 + 9 + 31 + 21) / 5 = 19.8

Company 3 (15 + 15 + 15 + 15 + 15) / 5 = 15

Company 4: (13 + 10 + 45 + 12 + 15) / 5 = 19

Company 1 has the longest average commute time per employee.

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3 years ago