Write an expression that is equivalent to 3 (2x + 6y)

6x+18y

Step-by-step explanation:

6x + 18y or 6 (x + 3y)

Step-by-step explanation:

Distribute the 3 or divide the parentheses by 2

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:

(a) the volume of the cone is 20/3 in3

hence, option a is correct.