Martin and William have invited friends, who do not all know each other, for dinner. All eight people will be seated at a round table, and the host wants to seat them so that each guest will know the people sitting on each side of him or her. In the graph below, two people who know each other are connected by an edge. What is the seating arrangement?

20

step-by-step explanation:

you need to show us the graph.

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: