Answer:
0 to 125 bottles
Step-by-step explanation:
because you have $500 dollars, and you want to have $350 dollars [at least] left over, you can only spend $150 [500 - 350 = 150] dollars.
if we can spend up to $150 dollars, there is a large range of numbers of bottles that would meet the situation.
(multiplied by 1.20 because that is the price of 1 bottle. You are finding how many "1.20s" go into a certain number--150. )
If you buy 0 bottles, you will be spending
1.20 × 0 = 0
0 dollars
If you spend 30 bottles, you will be spending
1.20 × 30 = 36
36 dollars
So, how many bottles can we possibly buy?
To find this number, we can work backwards from our equation
(our equation is 1.20 × number of bottles)
I will be writing "number of bottles" as "x"
We know that 1.20 · x ≤ 150
(≤ means less than or equal to. we can spend <u>less than</u> 150 dollars, or we can spend 150 dollars exactly)
So, we can divide both sides of our equation by 1.20 to find the number of bottles [x] fit into 150.
1.20 · x ≤ 150
÷1.20 ÷1.20
x ≤ 125
So, we can buy 0 to 125 bottles of water {to have at least 350 dollars left over}
