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Paraphin [41]
3 years ago
9

BRAINLIEST + POINTS ! Can someone help/explain to me why I got this wrong and solve it!

Mathematics
1 answer:
Margarita [4]3 years ago
4 0

Standard deviation is the square root of the variance.

To  find the variance from the standard deviation, raise it to the 2nd power:

Standard deviation = 4

Variance = 4^2 = 4x4 = 16.

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Find the first term of the arithmetic sequence in which a38= -5 and the common difference is -2.9
mestny [16]

Answer:

102.3

Step-by-step explanation:

a_38 = -5

difference d= -2.9

We use general formula

a_n = a_1 + (n-1)d

WE make the formula for a_38 th term

Plug in 38 for n

a_{38} = a_1 + (38-1)d

Now plug in -2.9 for d and -5 for a_38

-5 = a_1 + (38-1)(-2.9)

-5 = a_1 - 107.3

Now add 107.3 on both sides

102.3 = a_1

option A is correct



3 0
3 years ago
Read 2 more answers
Find the value of each angle mentioned above.​
nataly862011 [7]

Answer:

36°, 42°, 72°, 102°, 108°

Step-by-step explanation:

Angles at a point = 360°

Therefore:

(3x - 6) + x + 3x + 2x + (x + 6) = 360°

Open parthenogenesis

3x - 6 + x + 3x + 2x + x + 6 = 360

Add like terms

10x = 360

Divide both sides by 10

x = 36

✔️Value of each angle:

Plug in the value of x in each expression

x = 36°

3x - 6 = 3(36) - 6 = 102°

3x = 3(36) = 108°

x + 6 = 36 + 6 = 42°

2x = 2(36) = 72°

3 0
3 years ago
X^(2)+y^(2)+14x+18y+114=0<br><br><br> i will give u brainliest and my eternal love
cluponka [151]

Answer:

(x+7)^2+(y+9)^2=16

Step-by-step explanation:

This is the equation written in standard form, I'm not sure if that's what you wanted.

6 0
3 years ago
Read 2 more answers
Ahmad and Cameron solved the same inequality but got different answers one of the solution is incorrect find and correct error
Alex73 [517]
What is the equation.
3 0
3 years ago
!!!PLEASE HELP!!! ASAP
Andrej [43]

Answer:

Pretty sure it's 3.5 because...

Step-by-step explanation:

7 ÷ 2 = 3.5

8 0
4 years ago
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