If you buy a package of 20 rolls of paper towels for $38.15 how much money does 1 paper towel roll cost at the same unit rate
1 answer:
Answer: $1.90
Step-by-step explanation:
Divide 38.15 by 20.
Since
20 rolls = $38.15
1 roll = ?
Here it is in simple terms. So, if we already know the cost of 1 roll, to find 20 rolls, we have to multiply the cost of 1 roll by 20 rolls. However, since that is not the case, it is the opposite, we'll do the opposite operation. Meaning we divide. So that's why we are dividing. Nevertheless, there are other ways of doing this. For example, setting up fractions. But this way is simple and easy, so you'll rememeber.
In tenths place, it is $1.90, therefore the cost of 1 paper towel at the same unit rate is $1.90.
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Answer:
Step-by-step explanation:
Let age of each twin be x
let age of sister be s
So we can write:
x + 4 = s
The product of the 3 siblings ages is 3482 more than sum. We can write:
This can be simplified as:
We replace s with "x + 4" and solve:
<u>Note:</u> To solve this cubic, we used technology
Thus, we can say the twins are 14 years old