algebra inequality help - XP Math - Forums

 XP Math - Forums algebra inequality help

 09-29-2009 #1 sri340 Guest   Posts: n/a algebra inequality help Ike’s age is three years more than twice his younger brother’s age. If the sum of their ages is at most 18, then find: (a) the greatest age that Ike’s brother could be. (b) an inequality that represents all possible values of Ike’s age (allowing for fractional years), given that his younger brother is at least 2 years old.
09-30-2009   #2
Mr. Hui

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Quote:
 Ike’s age is three years more than twice his younger brother’s age. If the sum of their ages is at most 18, then find:
(a)
Let i = Ike's age
and
y = Younger brother's age.

i = 2y + 3

If the sum of their ages is at most 18 then:

y + 2y + 3 < 18

Solving the inequality:
y + 2y + 3 < 18
3y + 3 < 18
3y < 15
y < 5

Ike's brother is at most 5 years old.
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 03-06-2010 #3 jmw106462 Last Achievements     Join Date: Feb 2010 Posts: 388 Ike's brother equals 5 year old. Well, To 5-6 Years, Old. __________________ Please refrain from sending me frivolous PM's

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