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makkiz [27]
3 years ago
12

7.7.47 Assigned Media A snowstorm causes a bus driver to decrease the usual average rate along a 240-mile route by 10 miles per

hour. As a result, the bus takes four hours longer than usual to complete the route. At what average rate does the bus usually cover the 240-mile route? miles per hour. The bus usually covers the 240-mile route at an average rate of​
Mathematics
1 answer:
Minchanka [31]3 years ago
8 0
No I’m sorry bro bro lol bro I’m kidding lol
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Help! I’ll mark you brainly and give extra points!!
irina1246 [14]

Answer:

Slope: 2

y-intercept: (0, -4)

x           y

0          -4

2           0

Hope this helps! Can I have Brainliest please?

See attachment below:

8 0
3 years ago
Read 2 more answers
The faster a vehicle is going, the further it will continue to travel after the brakes are applied. Which is the dependent varia
harina [27]
The answer would be kinetic energy
4 0
3 years ago
Considering the number of questions incorrect from classmates on a quiz {10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19,
IrinaK [193]

Answer:

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

Step-by-step explanation:

We are given the following data in the question:

10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{225}{15} = 15

Sum of squares of differences = 25 + 16 + 9 + 4 + 4+ 4 + 1 + 0+ 1+ 1 + 4 + 9 + 9+ 16 + 25 = 128

S.D = \sqrt{\dfrac{128}{14}} = 3.02

Empirical rule:

  • According to this rule almost all the data lies within three standard deviation of the mean for a normal distribution.
  • About 68% of data lies within one standard deviation of the mean.
  • About 95% of data lies within two standard deviations of mean.
  • Arround 99.7% of data lies within three standard deviation of mean.

Thus, by empirical rule,

\mu \pm 1\sigma = 15\pm (3.02) = (11.98,18.02)

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

5 0
3 years ago
Find<br> ∫^[infinity]_-[infinity] x/(1+x^2)^2 dx.
son4ous [18]

Answer:

Step-by-step explanation:

integral(x/(1+x^2)^2)dx

=(1/2)integral(2x/(1+x^2)^2)dx

=(1/2)[-1/(1+x^2)] +c

3 0
3 years ago
If f(x)=4^x, find f(4)
lina2011 [118]

Answer:

\huge\boxed{f(4) = 256}

Step-by-step explanation:

<u>Given function is:</u>

f(x) = 4^x

Put x = 4

So,

f(4) = 4^4\\\\f(4) = 256\\\\\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
6 0
3 years ago
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