7. what is the sum of 1/9, 2/3, and 5/18? a. 4/15 b. 8/30 c. 12/9 d. 19/18

ANSWER

The correct answer is D.

EXPLANATION

We want to find the sum of

We find the least common denominator.

The least common multiple of 3,9, and 18 is 18.

We collect LCD to obtain:

We multiply out to get:

We now add the numerators to get:

The correct answer is D.

7

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6