If 3x + 2y = 8 and x is twice the value of y, what is the value of x
-y?

Step-by-step explanation:

Given:

since x is twice the value of y , this means that :

 .......................... **

we will the substitute it into the main equation , that is we will substitute 2y in place of x. so the equation becomes :

divide through by 8

substitute y = 1 into equation ** , that is

this means that :

and , so

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm