Answer:
Step-by-step explanation:
2/3+1/3x=2x
moving all the x to one side
2/3=2x-1/3x
factoring out x
2/3=x(2-1/3)
dividing
(2/3)/(2-1/3)=x
The circumference is (2 pi) (radius) . The ratio of radius to circumference is (1)/(2 pi).
The answer is D. Because the negatives cancel out and equal a positive. therefore -1-(-7) =-1+7