So how do i go about doing this, ik the formula for trapezoid area, but the answer i get isn't in the options. i figure the base is 9 cm due to the 2 triangles being next to it. 2+5+2=9 of course, but i clearly can't get the right answer. any or tips?

answer:

free points

step-by-step explanation:

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)