The radius of a circle is 15. Using π, which equation expresses the ratio of the circumference to the diameter of a circle? Question 2 options: C30=π C=15πr C15=π C=r30π

The ratio of the circumference to the diameter of a circle is equal to

Step-by-step explanation:

we know that

The circumference of a circle is equal to

we have

----> the diameter is two times the radius

so

The ratio of the circumference to the diameter of a circle is equal to

simplify

Step-by-step explanation:

The circumference of the the circle with radius is  

,

and the diameter is 2 times the radius:  

.

Therefore, the ratio of the circumference to the diameter is

And since the diameter of our circle is

,

the ratio of the circumference to he diameter we get is

which can be rewritten as

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )