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JulsSmile [24]
3 years ago
8

A runner increased his average speed from 250 to 300 m/min, and he

Mathematics
1 answer:
Fittoniya [83]3 years ago
8 0
Average speed = 300 m/min
Time = 1 min
Distance = Average speed x Time
Distance = 300 m/min x 1 min
Distance = 300 m
Hope this help <3
Help me and mark my answer as brainliest plz
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Find the point, M, that divides segment AB into a ratio of 2:3 if A is at (0,15) and B is at (20,0)
oksano4ka [1.4K]

The ratio has a total of 2+3=5 units, of which 2 correspond to the length of segment AM. The difference of x-coordinates Bx-Ax = 20-0 = 20. 2/5 of that amount is (2/5)*20 = 8, so the x-coordinate of M is

Mx = 8 + Ax = 8 + 0 = 8

The difference of y-coordinates is 0 - 15 = -15. 2/5 of that amount is (2/5)*(-15) = -6, so the y-coordinate of M is

... My = -6 + Ay = -6 + 15 = 9

The point M is (Mx, My) = (8, 9).

6 0
3 years ago
Experience raising New Jersey Red chickens revealed the mean weight of the chickens at
Nikolay [14]

Answer:

p-value = 0.1277

Step-by-step explanation:

p-value is the probability value tell us how likely it is to get a result like this if the Null Hypothesis is true.

Firstly we find the mean and standard deviation of the given data set.

⇒ Mean = \frac{4.41 +4.37+ 4.33+ 4.35 +4.30 +4.39 +4.36+ 4.38+ 4.40+ 4.39}{10}

⇒ Mean = 4.368

Standard deviation(\sigma) = \sqrt{\frac{1}{n}\sum_{i=1}^{n}{(x_{i}-\bar{x})^{2}} }

where, \bar{x} is mean of the distribution.

⇒ Standard Deviation = 0.034

Applying t- test:

Let out hypothesis is:

H₀: μ = 4.35

H₁: μ ≠ 4.35

Now,

Here, μ = Population Mean = 4.35

\bar{x}= Sample Mean = 4.368

σ = Standard Deviation = 0.034

n = 10

t=\frac{\bar{x}-\mu}{\frac{\sigma}{\sqrt{n}} }

Putting all values we get, t = 1.6777 with (10 -1) = 9 degree of freedom.

Then the p-value at 99% level of significance.

⇒ p-value = 0.1277

6 0
4 years ago
7w + 6 + 2w = (w + 2)
Sindrei [870]

Hey there!

The correct answer is w = \frac{-1}{2}

7w + 6 + 2w = w + 2          ~ Write the equation

9w + 6 = w + 2                   ~ Simplify

8w + 6 = 2                          ~ Subtract w from both sides

8w = -4                             ~ Subtract 6 from both sides

w = \frac{-1}{2}                                ~ Divide both sides by 8

Hope it helps and have a great day!

4 0
3 years ago
PLZ NEED HELP IS DUE TONIGHT !!!!!!!!!!!!!!!!
Natasha2012 [34]

Answer: 9/20

How to: <u>  Simplify the expression.</u>

Have a great day and stay safe ! sorry if im wrong .

3 0
3 years ago
The sum of two times a number and 5 is 11
Alika [10]
So it can be written as 2x + 5 = 11, and x = 3
5 0
3 years ago
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