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Bobby wants to go on a school trip that will cost him $250. He comes up with an equation that represents how much he needs to save each week as follows: 25w+30=250, where W is the number of week spent saving.

If he has 9 weeks to save will you have enough money to go on the trip? Explain.

Respuesta :

KoonAgueroAgnis
Yes, Bobby will have enough money if he saves for 9 weeks. You can find this through either substituting w for 9 in the equation, or solving the equation itself. 

Substituting:

[tex]25(9)+30[/tex]
Substitute w for 9. 

[tex]225+30[/tex]
Simplify. 

[tex]225+30=255[/tex]
Solve. 

255 is greater than 250, so yes, he will have enough money saved. 


Solving the equation:

[tex]25w+30=250[/tex]
Original Equation

[tex]25w=220[/tex]
Subtract 30 from both sides. 

[tex]w=8.8[/tex]
Divide both sides by 25. 

The number of weeks he needs is 8.8. When rounding it up, you get 9. 


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