# Algebra

posted by Krys

Mary is y years old.
Write an algebraic expression in terms of y for the age of
A) her brother, who is 4 years older.
B) her mother, who is 3 times as old.
C) her sister, who is 2 years younger.

1. Ms. Sue

y + 4
3y
y - 2

2. Abigail

y + 4
3y
y-2

Think about it like this, if Mary had four brothers, she is Mary's age plus the age of 4 brothers, but we don't know it, so Y + 4 is good enough.

3y, because Mary had a little lamb that was 3.

And Y-2 because its her and 2 others who died in the car crash. Get it?

No?

Good.

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