5,649 rounded to the nearest thousand is:
6,000 because 6 is larger than 5
Hope I Helped!!! :-)
G is the answer because if you set x as the value of B, then x+(x+10)+(x+30)=180 so x=46.67. then you add 10 to that because the value of A is 10 more than B
All you need is the double angle identity:

So we have

Apply the identity again to the squared term:

Just simply subtract 23 by 15 to get the difference of 8