The quotient of x and 5 is equal to 35 (write and solve an equation based off the verbal phrase)

The solution is, x = 175

Step-by-step explanation:

Given phrase,

The quotient of x and 5 is equal to 35,

∵ Quotient of x and 5 =

So, the required equation is,

Multiply both sides by 5,

Hence, the solution of the given equation is, x = 175.

Understanding your post takes a bit of guesswork.  I'm assuming you mean the following expression:

pi * r^2      ("pi times the square of the radius, r").

Unless you share the value of "x," we can't go any further.  The intermediate answer is 

pi * x^2.

If x represented the radius of a circle, and if x=3 inches, then the area of the circle would be

A = pi * (3 inches)^2, or p * 9, or 9 * pi.

Or you could approximate pi with "3.14":  Area = A = 3.14 * 9.  Evaluate this to 2 decimal places.