Hello,
x=r cos t
y=r sin t
x²+y²=r²
r=4 cos t
r=4x/r==>x²+y²=4x
==>(x-2)²+y²=4 (a circle center (2,0),radius 2)
Answer: C) All real values of x such that 
In other words, x must be 0 or smaller.
===================================================
Explanation:
The reason why is because we must make the stuff under the square root to never be negative. We must make -2x be 0 or larger.
So,

As an example, if x = -2, then -2x = -2(-2) = 4 is positive. Applying the square root to a positive number is valid.
But if x = 5, then -2x = -2*5 = -10 is under the square root, which is not allowed.
I think the answer is y=6x
we have

Step 1
Applying the distributive property in the left side ( Multiply the factors on the left side)

therefore
<u>the answer is</u>

Answer:
Where's the drawing? Can you include it?
Step-by-step explanation: