Four brothers and their sister have the average age 7. Four brothers have the average age 6. How old is the sister?
1 answer:
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- Let r represent Rick’s height.
- Therefore, the quotient of Rick’s height and 4
- Fred is 5 inches shorter than the quotient of Rick’s height and 4.
- Therefore, an expression that represents Fred’s height is
Answer:
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Answer:
5, 7, 9
Step-by-step explanation:
Using the information given we get:
<em>Add 7 to both sides</em>
<em>Subtract 2x from both sides</em>
<em>Divide both sides by 3</em>
Using these equations:
and
We get: