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kipiarov [429]
4 years ago
14

The difference between the solutions to the equation x2= a is 30. what is a?

Mathematics
1 answer:
kirza4 [7]4 years ago
6 0
A equals 30 if you read it is going to say that the answer is 30
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The time taken to complete a motorcycle race is normally distributed, with an average time (µ) of 2.5 hours and a standard devia
torisob [31]

Using the normal distribution, there is a 0.5398 = 53.98% probability that a randomly selected cyclist will take at least 2.45 hours to complete the race.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 2.5, \sigma = 0.5

The probability that a randomly selected cyclist will take at least 2.45 hours to complete the race is <u>one subtracted by the p-value of Z when X = 2.45</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = \frac{2.45 - 2.5}{0.5}

Z = -0.1

Z = -0.1 has a p-value of 0.4602.

1 - 0.4602 = 0.5398.

0.5398 = 53.98% probability that a randomly selected cyclist will take at least 2.45 hours to complete the race.

More can be learned about the normal distribution at brainly.com/question/4079902

#SPJ1

3 0
2 years ago
Given the following absolute value function find the range. ƒ(x) = |x + 5| - 8
balandron [24]
The result of an absolute value operation is never negative. So the smallest that the expression |x+5| can be is 0. 

Tacking on "-8" to |x+5| leads to |x+5|-8

The range of this is [-8, infinity) since the smallest |x+5|-8 can be is -8. All I did was subtract 8 from the smallest value of |x+5|

Final Answer: choice C)
7 0
3 years ago
Are the pair of lines parallel, perpendicular or neither? 8x-4y=12 and 4x-y=-15
Orlov [11]

Answer:

neither, would technically be intersecting lines tho

Step-by-step explanation:

6 0
3 years ago
Please spam me thanks all
Olenka [21]

Answer:

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
Please help with this and explain the answer.
zysi [14]

Answer:

48.06

Step-by-step explanation:

b^2+c^2=A^2

45+16=42.06

add the extra 6

3 0
3 years ago
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