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September 3, 2015

Homework Help: Math

Posted by Chris on Thursday, February 3, 2011 at 9:26am.

Could someone please help me solve this problem, the age numbers that I am working with are 10yrs old 55yrs old and 75yrs. old. I need to know at my age of 55, in years, how old was the older person of 75 when I was born?

Could you please write an equation that models how old in years each of us will be, when our ages add up to 150 years old. For example, if x = your age and the eldest person was a year older than you, you would write their age as x + 1. Then the equation would be: x + (x+1) = 150.

Explain the reasoning which helped you develop your equation.

Solve for your future ages. Are your answers reasonable, do they add up to 150?

In years, how old were you when the youngest person was born?

At some point during the lives of you and the youngest person, your age will be three times his/her age at that moment. Write an equation which models how old in years each of you will be when you are three times as old as the younger person.

Explain the reasoning which helped you develop your equation.

Solve the equation for your ages when you are three times as old as the youngest person. Are your answers reasonable?

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