Answer:

Step-by-step explanation:
The given equation in rectangular coordinates is;

We use the relation;

and

This implies that;


Divide through by r to get;

Divide both sides by 

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

Answer:
3 pencils
Step-by-step explanation:
eraser= 0.25
pencil= 0.75
2(0.25)= cost of erasers
0.5 + p=2.75 (p=pencils)
-0.5 -0,5
p=2.25
divide 2.25 by 0.75
=3
Answer:
lorenzo
Step-by-step explanation:
because he has added more blue shade which will make the icing darker , Mariana's icing will be lighter as she added less blue shade :)
Answer:
(3,1) because x is 3 and y is 1.
Step-by-step explanation:
x+2y=5
3x+5y=14
Multiply first equation by 3:
3x+6y=15
3x+5y=14
Subtract 3x:
1y=1
Therefore, y = 1
Plug it back into 1st equation:
x+2(1)=5
x+2=5
Therefore, x = 3
Judging from your answers, it looks like (3,1) because x is 3 and y is 1.
I hope this helped!