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Brut [27]
3 years ago
11

What is the standard deviation of the data set 21 ,6,18,21,20,14,19

Mathematics
1 answer:
VashaNatasha [74]3 years ago
8 0
21 is the answer i think idk try dividing them all or finindng something or look up how to find a standard deviation 


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Please help if the value of (x+1)^2-3 is 22 what is the value of (x+1)^2-5
Finger [1]
We could solve for x, but notice that the same expression is being squared in both (x+1)

if (x+1)^2 - 3 = 22 then
  (x+1)^2 = 25

that would mean that (x+1)^2 - 5 = 25 - 5 = 20


7 0
3 years ago
Meryl needs to cut down 10.510.510, point, 5 trees for every 555 cabins she builds.
Angelina_Jolie [31]

Answer:

3 cabins takes 6.3 trees

7 cabins takes 14.7 trees

Step-by-step explanation:

divided 10.5 by 5= 2.1 trees per cabin

2.1 x however many cabins your gonna build

6 0
3 years ago
Evaluate \dfrac{e}{4}+2f-3 4 e ​ +2f−3 when e=12e=12 and f=\dfrac12f= 2 1 ​ .
Verdich [7]

Answer: -406

Step-by-step explanation:

We have the following expression:

\frac{e}{4}+2f-34e+2f-3

In addition we know:

e=12 and f=\frac{1}{2}

If we substitute this in the expresion, we will have:

\frac{12}{4}+2(\frac{1}{2})-34(12)+2(\frac{1}{2})-3=-406

4 0
3 years ago
Read 2 more answers
your $440 gets 5.8% interest compounded annually for for 8 years what will your $440 be worth in 8 years l?​
Dmitriy789 [7]

Answer:

The answer is $690.78

Step-by-step explanation:

7 0
3 years ago
Find the values of x and y using the given​ chord, secant, and tangent lengths.
inn [45]

Answer:

x = 15.65

y = 3.5

Step-by-step explanation:

Step 1

Find the equation for x and y

Equation for x is given as

x² = 7( 7+28) ..........Equation 1

14(14 + y) = x²........ Equation 2

Solving for Equation 1

x² = 7( 7+28)

x² = 7(35)

x² = 245

x = √245

x = 15.65

From Equation 1 , x² has been determined to be 245

Therefore we substitute 245 for y in Equation 2

14(14 + y) = x²........ Equation 2

14(14 + y) = 245

196 + 14y = 245

14y = 245 - 196

14y = 49

y = 49 ÷ 14

y = 3.5

4 0
3 years ago
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