pellis14 pellis14

11-09-2020
Mathematics

contestada

Mary is half of her sister's age. The sum of their
ages is 18. How old is her sister?

Respuesta :

Awesomenooby Awesomenooby

11-09-2020

Answer:

Mary's sister is 12 years old.

Step-by-step explanation:

If Mary is half of her sister's age, her sister is 2 times her age.

Represent M as Mary's age...

M+2m=18

3m=18

3m/3=18/3

m=6

But because Mary is a half of her sister's age...

6*2=12

Answer Link

Аноним Аноним

02-03-2021

Answer:

12 years

Step-by-step explanation:

12/2 = 6

12 + 6 = 18

Answer Link

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