Question

find the missing side length, in units, in the scaled copy.

original	scaled copy
10	blank

(original rectangle: length 10, height 5; scaled copy rectangle: height 15, length 7 (labeled))

Explanation:

Step1: Find the scale factor

The original side length is 5, and the scaled copy side length is 15. The scale factor \( k \) is calculated as \( \frac{15}{5} = 3 \).

Step2: Apply the scale factor to the other original side

The original side length is 10. Multiply it by the scale factor 3: \( 10 \times 3 = 30 \).

Answer:

30