Answer:
Where's the question, please?
3/4n - 18 = 1/4n - 14
We need to isolate "n"
So, add 18 to both sides.
3/4n = 1/4n - 14 - 18
Then, subtract 1/4n from both sides.
3/4n - 1/4n = -14 - 18
*Note : Since "n" has the same denominator (bottom number in a fraction), then we simply need to look at the top numbers (numerators) and simplify those.
Simplify.
2/4n = -32
Then, multiply both sides by 4 so that we get rid of fractions.
4 · 2/4n = -32 · 4
Simplify.
2n = -128
Now, divide both sides by 2.
2 ÷ 2n = -128 ÷ 2
Simplify.
n = -64
~Hope I helped!~
:)
Answer:
(3/8) + (1/8)cos 4x - (1/2)cos 2x
Step-by-step explanation:
sin^(4) x = (sin² x ) (sin² x) ------ (1)
Recall double angle identity: cos 2x = 1 - 2 sin² x
or sin² x = (1/2) (1 - cos 2x)
substituting this into (1)
sin^(4) x = (sin² x ) (sin² x) = [ (1/2)(1-cos 2x) ]²
= (1/4) ( 1 - 2 cos 2x + cos²2x) ------(2)
Also recall double angle identiy : cos 2x = 2 cos² x - 1
or cos² x = (1/2) ( 1+ cos 2x)
or cos² 2x = (1/2) ( 1+ cos 4x)
substituting this into (2)
(1/4) ( 1 - 2 cos 2x + cos²2x)
= (1/4) [ 1 - 2 cos 2x + (1/2)(1 + cos 4x) ] (expand and reduce)
= (3/8) + (1/8)cos 4x - (1/2)cos 2x
Answer:-2n^2-2n+19
Step-by-step explanation:
To find the sum of 8n-n^2+12 and 7-n^2-10n
We collect like terms
-n^2-n^2+8n-10n+12+7
-2n^2-2n+19
Answer:
30 degrees ???
Step-by-step explanation: