Elena spent $4 per centimeter on board if she spent $16, including tax, on 4 centimeters of wooden board.
Fraction number consists of two parts one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
We have:
Elena spent $16, including tax, on 4 centimeters of wooden board.
Let's suppose the cost per centimeter of the board is x.
Mathematically,
Elena spent $16 on 4 centimeters
Elena spent $x on per centimeters
[tex]\frac{16}{x}= \frac{4}{1}[/tex]
4x = 16 (after cross multiplicayion)
x = $4 (divide by 4 on both sides)
Thus, Elena spent $4 per centimeter on board if she spent $16, including tax, on 4 centimeters of wooden board.
Learn more about the fraction here:
brainly.com/question/1301963
