Which of the following pairs of coordinates represents the same point in polar coordinates?
Check all that apply.

A. (r, theta) and (-r, theta+2pi)
B. (r, theta) and (-r, theta)
C. (r, theta) and (-r, theta+pi)
D. (r, theta) and (r, theta+2pi)

step-by-step explanation:

the first 5 right here the next 5 i will upload as separate question

answer: a

step-by-step explanation:

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2