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KonstantinChe [14]
3 years ago
10

What is the mean for 20 30 40 50 60 70 80 90 110 120 130?

Mathematics
1 answer:
Lena [83]3 years ago
5 0
TO find the mean of a group of numbers you simply find the average. To do that, just simply add up all the numbers, then divide by how many numbers there are. So when you add up all of those numbers you get to a sum of: 800
Then divide by the totaly amount of numbers which is 11, so 800 divided by 11 equals: 
The mean for those set of numbers is: 72.7272 reapeating so...
72.72 (with a little line over the digits on the right side of the decimal)
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Add or subtract. use the least common multiple as the denominator what is 5/8-5/25
Vinvika [58]

Answer:

17/40

Step-by-step explanation:

First let's find the least common denominator. The denominators are 8 and 25 so we need to find the least common multiple of 8 and 25.

8=2*2*2

25=5*5

Since they share no common factors the least common multiple of 8 and 25 is 8*25 which is 200.

Now we convert the fractions:

5/8*25/25=125/200

5/25*8/8=40/200

Then we subtract:

125/200-40/200=85/200

Now we simplify it:

17/40

8 0
2 years ago
Read 2 more answers
the equation I=prt solves for the amount of simple interest a bank account receives after a certain period of time. I stands for
Dominik [7]

Answer:

The percentage rate is 4.5%.

Step-by-step explanation:

The given formula for simple interest is I=prt where I=simple interest, p=principle, r = percentage rate and t=time.  In the problem, we are told that after six years (t=6), $7000 (p=7000) earns $1890 (I=1890).  We can then substitute in the values for three of our variable to get the following:  1890 = (7000)(6)r.  Multiplying 7000x6 = 42000 giving us 1890 = 42000r.  Using inverse operations, we divide both sides of the equation by 42000 to get 0.045 = r.  Since r = percentage rate, we need to multiply our decimal by 100 to find the percentage.  0.045 x 100 = 4.5%.

5 0
3 years ago
How to solve this using trigonometry?
Leya [2.2K]
Using SOHCAHTOA and Kenui's height and angle of depression (which is the downward angle from the horizontal ) the answer should be:  

because its the Adjacent and Opposite sides use Tan;  
Tan(6.8) = o/a
tan(6.8) = Distance / 219
tan(6.8)(219 = Distance 
26.114 m 

But because the angle of depression is the downward angle from the horizontal the answer may be Tan(83.2)(219) = 1836.589
the 83.2 coming from 90 degrees - 6.8 degrees 

either way i"m still unsure because I don't see a need for the two angles or Mias involvement, sorry if I'm wrong  


8 0
3 years ago
ANSWER ASAP PLSSS
Andrei [34K]

vbbbbbbbbbbbbbbbbbdnnnnnAnswer:

Step-by-step explanation:

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20" id="TexFormula1" title=" " alt=" " align="absmiddle" class="latex-formula"><br><img src="
seropon [69]
\text{The range of}\ y=-3^x\ \text{is}\ (-\infty;\ 0).\\\\\text{The range of}\ f(x)=-3^x+7\ \text{is}\ (-\infty;\ 7)
6 0
3 years ago
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