Answer:
90
Step-by-step explanation:
To find s4 we find sum of values when n=1,n=2,n=3,n=4
given expression is 
n=1 , plug in 1 for n

n=2

n=3

n=4

Sum of all 4 terms = 6+12+24+48=90
The square root of 51.84 is 7.2
Y=-4 is one of your answers
Answer:
Each side of the photocopy of the picture is enlarged by a factor of 2 so it would be A.
Step-by-step explanation:
Answer:
they are opposites. for example: 3, -1/3, -4, 1/4
Step-by-step explanation:
hope this helps