<span>cos 4x + cos 2x = 2 - 2 sin^2 2x - 2 sin^2 x
cos 4x + cos 2x = 1 + 1 − 2sin^2(2x) − 2sin^2(x)
cos 4x + cos 2x = (1 - 2sin^2(2x)) + (1 - 2 sin^2(x)
cos 4x + cos 2x = cos 4x + cos 2x</span>
Answer:
no
yes
yes
0.92 cents
4.72
9.26
Step-by-step explanation:
Answer:
10.59%
Step-by-step explanation:
percentage of change is given by
{(old number - new number)/old number} * 100
_________________________
given
no. of student went to the first school dance = 340
no. of student went to the last school dance = 306
Percentage of change between two dance
= ((no. of student went to the first school dance - no. of student went to the last school dance)/ no. of student went to the fist school dance)*100
= (340 - 306)/340 *100
= (36/340 )*100 = 10.59%
The percent of change between the two dances 10.59%.
(3x-2x) +2y +2
= 1x + 2y + 2
= x + 2y + 2
P>7, because...
26p-20>14p+64
-14p -14p (Subtract 14 from both sides)
-----------------------
12p-20>64
+20 +20 (add 20 to both sides)
----------------
12p>84
/12 /12 (divide both sides by 12)
-----------
p>7
Hope this helps!
