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aleksley [76]
3 years ago
5

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 sa

ve 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.
Mathematics
1 answer:
monitta3 years ago
4 0
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:

25(9)+30
Substitute w for 9. 

225+30
Simplify. 

225+30=255
Solve. 

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


Solving the equation:

25w+30=250
Original Equation

25w=220
Subtract 30 from both sides. 

w=8.8
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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