Mathematics, 05.05.2020 12:53, obalzano6817

Adam is n years old . Mary Beth is 3n + 4 years old . If Adam is 9 years old, how old is Mary Beth?

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Step-by-step explanation:

answered: SoccerHalo

If you mean Mary Beth's age is 3 times Adam's age. If thats what you mean by 3n then Mary beth is 31 years old.

Step-by-step explanation:

First set up your equation for Marys age: 3n + 4. Next subistute (replace the n with a 9 for adams age.) You should have 3 times 9 + 4. That means the elling you to equation will be 3(9) + 4. (The whenever you see #(#) that means you multiple the two numbers together. In other words #(#) is another way of telling you to multpile.) So based on Order of Operations (PEMDAS) you would multipile the 3 and the 9 to get 27. Then you would add 27 and 4 to get 31. This means that Mary Beth is 31 years old.

answered: Guest

step-by-step explanation:

this is not a question

answered: Guest

step-by-step explanation:

sry but any answer choices

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