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diamong [38]
3 years ago
14

Variance is equal to the square root of standard deviation. question 3 options:

Mathematics
1 answer:
Schach [20]3 years ago
5 0
B false standard deviation is the square root of variance
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Four times a number, minus 8, is equal to three times the number plus 4
Eva8 [605]

Answer:

4n-8=3n+4

Step-by-step explanation:

4n-8=3n+4

   +8      +8

4n=3n+12

-3n  -3n

n=12

6 0
3 years ago
Read 2 more answers
Tabitha earns $8.50 per hour at her summer job. She want to save money to buy a tablet that costs $289 plus 6% sales tax. Tabith
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Tabitha will have to work about 15 hours
8 0
3 years ago
I NEED HELP ASAP! <br> Just number 8 please! Thank you
ZanzabumX [31]

Answer:

18

Step-by-step explanation:

3 0
3 years ago
XVerify the identity. (7 points) cos 4u = cos22u - sin22u
Alexandra [31]

Answer:

cos 4u = co^s2 2u - sin^2 2u

Step-by-step explanation:

cos 4u = co^s2 2u - sin^2 2u

Let 4u = 2x

cos 2x = cos^2 x - sin^ 2 x

cos (x+x) = cos^2 x - sin^ 2 x

Using cos(x+y) = cos(x)cos(y) -sin(x)sin(y)

cos(x) cos(x)- sin(x) sin (x)= cos^2 x - sin^ 2 x

cos^2 (x) -sin^2 (x) =cos^2 x - sin^ 2 x

Since this is true

cos 2x = cos^2 x - sin^ 2 x

This is true

Substituting 4u back for 2x

cos 4u = co^s2 2u - sin^2 2u

This is true

5 0
3 years ago
The hands of a clock show the time 12:25 what kind of angle exists between the hands od the clock
Karo-lina-s [1.5K]

Answer:

Obtuse Angle

Hope this helps :)

7 0
3 years ago
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