You a line the decimal points right above each other and add the .45 to .8
Answer:
2 equivalent expressions w/ negative signs in different places.
a) 
=-1/5 x and x/-5
b) 
=14/-y and -14/1/y
c) 
=a/1/b and 1/b/1/a
d) 
=-c/y and -c/1/y
Step One: Line Up All the Digits. First, line up all of the numbers according to their place value.
Step Two: Multiply by the Ones Digit. ...
Step Three: Add a Zero Place Holder. ...
Step Four: Multiply by the Tens Digit. ...
Step Five: Add the Two Answer Rows Together.
The Jacobian for this transformation is
with determinant 
, hence the area element becomes
Then the integral becomes
where 
is the unit circle,
so that
Now you could evaluate the integral as-is, but it's really much easier to do if we convert to polar coordinates.
Then
I want to say 5 but I'm not sure
