Clarence’s age is 3/5 of amys age. Isaiah‘s age is 1/2 of Amy’s age .the sum of Clarences, Amy’s and isaiah’s age is 21 years. what is Amy’s age

Amy's 10 years old

Step-by-step explanation:

Clarence is ⅗ Amy's age

Isaiah is ½ Amy's age

Amy's age = ?

But summation of their age = 21

Clarence + Isaiah + Amy = 21

Let a represents Amy's age

⅗a + ½a + a = 21

Solve for a by resolving the fraction,

2.1a = 21

Divide both sides by 2.1

a = 10

Amy's 10 years old

; )

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