Hello.
Firstly, let's isolate x on the equation:

Now, we can replace 'x' for 'y' and vice-versa:

Hope I helped.
Answer:
A) d = 25/π
Step-by-step explanation:
To find the diameter of a circle, refer to the circumference formula:
C = d (π)
25 = d (π)
25/π = d
d = 25/π
Answer:
The ratio of the areas of these similar rectangles is 5:48.
Step-by-step explanation:
Let us convert area into fraction.
Ratio of the area of first rectangle to the area of second rectangle = 
= 

Hence, the ratio of the areas of these similar rectangles is 5:48.