Question

Catie is 3 years older than her brother. The sum of their ages is no more than 31.Write an inequality that can be used to representthis situation, wherexrepresents Catie's brother's age. Don’t combine like terms.

Answer 1

For this case we have to:

x: Be the variable that represents the age of Catie's brother

y: Be the variable that represents Catie's age

So, we have:

`y = x + 3\\x + y \leq31`

Substituting the first equation in inequality we have:

`x + (x + 3) \leq31`

Answer:

`x + (x + 3) \leq31`