SOLUTION: Michelle is three times as old as Fiona. Fiona is twice as old as Madeline. Madeline is seven years old. How old is Michelle? a. 42 years old b. 14 years old c. 21

Question 831075: Michelle is three times as old as Fiona. Fiona is twice as old as Madeline. Madeline is seven years old. How old is Michelle?
a. 42 years old

b. 14 years old

c. 21 years old

d. 12 years old

Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
Let B = Moochelle's age
Let F = Fiona's age
Let M = Madeline's age
.
Here's the information from the question:
B = 3F (Michelle is three times as old as Fiona)
F = 2M (Fiona is twice as old as Madeline)
M = 7 (Madeline is seven years old)
.
If F is 2M, then F = 2*7 = 14
Since B is 3F, and we know F to be 14, multiply 3*14 to get
42 <<--
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