Question

find the number that makes the ratio equivalent to 2:1. $square$:9

Explanation:

Step1: Set up equivalent ratios

Let the unknown number be $x$. Equate ratios: $\frac{x}{9} = \frac{2}{1}$

Step2: Solve for $x$

Multiply both sides by 9: $x = 2 \times 9$

Answer:

18