Step-by-step explanation:
n2+5=21
n2 =21-5
n2 = 16
n =16/2=8
To find the difference between these numbers you need to subtract 8.3 - 3.9
and that equals 4.4<span />
31 its easy just count the squares. Each half count to to equal one square.
Answer:
4
Step-by-step explanation:
x^2/ y^4
Let x=8 and y=2
8^2 / 2^4
PEMDAS says powers first
64 / 16
Divide next
4
same thing as:

there are two 8's and two x's in there so they can come out to give you the
answer 8x