Question

20 POINTS FOR WHOEVER CAN SOLVE THIS!

Christopher has $15 in his savings account. He wants to buy a guitar. He plans to save $10 a week. Prices for guitars at The Music Shoppe start at $130.
Which number line shows how long Christopher will have to save to buy a guitar from The Music Shoppe?​

Answer 1

15 + 10x = 130
-15 -15
10x = 115
divide both sides by 10
x= 115

Answer 2

To determine how long Christopher will have to save to buy a guitar from The Music Shoppe, we can start by calculating how much more money he needs to save beyond his current savings of $15.

The starting price for a guitar at The Music Shoppe is $130, and Christopher currently has $15 in his savings account. Therefore, he needs to save an additional:

$130 - $15 = $115

To save $115 by saving $10 per week, we can divide the total amount needed by the amount saved per week:

$115 ÷ $10 = 11.5

So Christopher will need to save for approximately 11.5 weeks to have enough money to buy a guitar from The Music Shoppe.