{7}{11}={18}{x+1} x =

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x

not sure but it may be b, as i said i'm not sure.

parallelogram is the   answer