Nina is saving up to purchase a new phone. The new phone costs $499. Nina received $100 for her birthday and plans to put that towards the new phone. To save the rest of the money, Nina plans to put aside $50 per week until she has saved enough to purchase the phone.

Write an equation that represents Nina's savings towards earning her new phone. Use w to represent the number of weeks.

(1 point)
Responses

50w−100=499
50 w minus 100 is equal to 499

50w=499
50 w is equal to 499

50w+100=499
50 w plus 100 is equal to 499

100w+50=499

1 answer

To represent Nina's savings towards earning her new phone, we need to account for the initial amount she received for her birthday ($100) and how much she plans to save each week ($50 per week) until she reaches the total cost of the phone ($499).

The equation that represents this situation is:

\[ 50w + 100 = 499 \]

where $ w $ is the number of weeks Nina saves $50.

Therefore, the correct response is:

50w + 100 = 499
50 w plus 100 is equal to 499