Question

1. kellys new snowboard is 120% longer than her old snowboard. if the new snowboard is 150 cm, how many centimeters long is her old snowboard?

Explanation:

Step1: Define variable for old board

Let $x$ = length of old snowboard (cm).

Step2: Set up length relationship

New board = 120% of old board:
$$150 = 1.2x$$

Step3: Solve for $x$

Divide both sides by 1.2:
$$x = \frac{150}{1.2}$$
$$x = 125$$

Answer:

125 cm