Price of a calculator. Kayla paid $137.80, including

6% tax, for her graphing calculator. How much did
the calculator itself cost?

137.8 / 1.06 = 130

To find out how much the calculator itself cost, we need to determine the amount paid excluding the 6% tax.

First, let's calculate the tax amount. We know that the total amount paid is $137.80, which includes 6% tax.

So, to find out the tax, we can set up the following equation:

6% of X = $137.80
(6/100) * X = $137.80

Now, let's solve for X:

X = ($137.80) / (6/100)
X = ($137.80) * (100/6)

X ≈ $229.67

Therefore, the calculator itself cost approximately $229.67.