Tuesday
September 2, 2014

Homework Help: Algebra

Posted by Melissa on Saturday, December 23, 2006 at 5:58pm.

Mario is 16 years older than his sister Mercedes. Together, their ages total 36 years. How old is Mercedes?

Mercedes is 20 years old.

let x = Mario's age
y = Mercedes' age
======================
Mario is 16 years older than Mercedes; therefore, add 16 to Mercedes' age to get Mario's age. X = Y+16 is eqn 1.
eqn 2 is X + Y = 36
Solve the two equations simultaneously. 20 is not the right age for Mercedes' age. If 20 is her age, then Mario's age is 20 + 16 = 36 and the sum of the ages is 36 + 20 = 56 but the problem says the total is 36. Thus, 20 can't be right for Mercedes' age.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - Mary is as old as Mario will be when Mary is twice as old as Mario was ...
math - kristyn is 4 years younger than mario. 3 years from now, she will be two ...
algebra - kristyn is 4 yrs younger than mario.three years from now she will be ...
algebra - Jill is 2 years older than Mike. in 5 years, 5 times Mike's age will ...
algebra - A person is 3 times as old as aonther person but in 15 years she will ...
Math - Could someone please help me solve this problem, the age numbers that I ...
math - A. Brad is 12 years older than Sam . If Brad were 8 years older than he ...
math - A. A woman was 30 years old when her daughter was born.Her age is now 6 ...
math - mary is x years old. it is her birthday today. her sister, sherry is 4 ...
math - use the names and ages of yourself and the other two people you selected...

Search
Members