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34kurt
3 years ago
5

Find the mean of the set of numbers: 15, 13, 12, 12, 20

Mathematics
2 answers:
Butoxors [25]3 years ago
6 0
The mean of the data set is 14.4
Wewaii [24]3 years ago
6 0
Add all the numbers together and divide them by the number of numbers you added to get the mean (in other words the average)
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If a call started at 7:53 and ends at 8:25.<br> How long did the call last?
SOVA2 [1]

Answer:

33 minutes

Step-by-step explanation:

33min

7 0
3 years ago
75 POINTS HELP PLEASE
Lady bird [3.3K]
The correct answer is C) (5×10⁴)(1×10²)

Explanation:
The number of trees can be calculated by the formula:
trees = density × area

Consider that the problem says that the researcher makes an approximation, and the answers have numbers written in scientific notation.

The density is 86 trees/km², 
which can be rounded to 100 trees/km² 
and written as <span>1×10².
Therefore, density = </span>1×10² trees/km²

The area of a square can be calculated by the formula:
A = s²
   = 220² 
   = 48400 km²
which can be roundend to 50000
and written as <span>5×10⁴
Therefore, area = </span>5×10⁴ km²

Now, we can substitute in the original formula:
trees = (1×10²)(5×10⁴)
3 0
2 years ago
Read 2 more answers
What is the answer for 9x² + 3xy - 12x - 4y ​
Lostsunrise [7]

Answer:

{ \tt{9 {x}^{2} + 3xy - 12x - 4y }} \\  ={ \tt{x(9x + 3y - 12) - 4y}}

4 0
2 years ago
Read 2 more answers
What is the 13th term of this arithmetic sequence?<br><br> 132, 135, 138, 141, …
bonufazy [111]

168


132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162, 165, 168

4 0
3 years ago
Read 2 more answers
Which of the following order pairs is a solution of x+1/2y=1?<br><br> (-2,6)<br> (2,-6)<br> (-2,-6)
julsineya [31]
Y/2=1-x

y=2-2x

y(-2)=2-2(-2)=2+4=6, (-2,6)

So (-2, 6) is an ordered pair from x+y/2=1
3 0
2 years ago
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