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Dvinal [7]
3 years ago
6

Greg wants to find the median of a set of 9 data items. First,he ordered the items from least to greatest. What should he do nex

t?
Mathematics
2 answers:
zvonat [6]3 years ago
8 0
To find which term will represent the median, add 1 to the number of terms, then divide by 2 to determine the nth term that will be used.

9 + 1 = 10
10 \div 2 = 5

The median of the data set will be the 5th term in the ordered set.

Greg must add 1 to the number of items, then divide by 2.
mixas84 [53]3 years ago
5 0
After ordering the items from least to greatest, he should find the term in them middle. That term would be the median.


hope this helps
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Justin did push-ups for the past 555 days.The following data points are the number of push-ups he did each day.
Vitek1552 [10]

Answer: σ: 2.76

Step-by-step explanation:

Count, N: 5

Sum, Σx: 125

Mean, μ: 25

Variance, σ2:  7.6

Steps

look at attached pic for formula

σ^2 = \frac{Σ(xi - μ)^{2} }{N}

\frac{(21 - 25)2 + ... + (29 - 25)2}{5}

⇒ \frac{38}{5}

⇒ 7.6

σ =  \sqrt{7.6}

⇒   2.756809750418

⇒ or 2.76

3 0
2 years ago
Given f(x) = -x - 2, find x when f(x) = 12.
Flauer [41]

Answer:

We substitute

12 = -x - 2

14 = -x or -x = 14

so the answer is -14!

I am in honors high school algebra and I am 11. Trust me bro.

Step-by-step explanation:

3 0
3 years ago
You use 4 gallons of water on 30 plants in your garden. At that rate, how much water will it take to water 45 plants?
Wewaii [24]
Write a proportion like so:

4 gallons/30 plants= x gallons/45 plants

Cross multiply to find the value of x
4*45= 180
180/30= 6=x

Final answer: 6 gallons
4 0
3 years ago
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Dmitrij [34]
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6 0
3 years ago
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A tunnel is in the shape of a parabola. The maximum height is 31 m and it is 13 m wide at the base as shown below.
yan [13]
Using the given values from the problem and the illustration, three points are known which are (0,0), (6.5,-31), (-6.5,-31). The first step in solving this problem is to determine the equation of the parabola.
y = ax²
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6 0
2 years ago
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