Please help giving brainiest

Step-by-step explanation:

We know all angles in a circle or around a point is 360°

So using that we can make the equation:

the angles e and f are on a straight line so they add up to 180°

So the other side of the line will be 180 as well. Hence we can make the equation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: