Hello,
sin² x-cos² x=sin² x-(1-sin² x)=2sin² x-1
==============================
Answer:
1309 marbles
Step-by-step explanation:
- Simon has: 727 - 145 = 582 marbles
All together:
- Kadon marbles + Simon marbles
- 727 marbles + 582 marbles
Answer:
C
Step-by-step explanation:
Answer:
6.8
Step-by-step explanation:
8 * 6 = 48 (to reverse dividing by 6 to basically un-average the 6 numbers).
5 * 4 = 20 (to un-average these numbers as well).
48 + 20 = 68
68 / 10 = 6.8
Basically by doing this you are still adding all the numbers together & then dividing by 10 as if you added them all up at once & not in a group of 6 & a group of 4.
Hope this helped. :)
