if a carpet is advertised at $20 per square yard, what is the cost per square foot?

Answer 1

3 ft = 1 yd, so (3ft)² = (1yd)^2. Thus, 1 yd² = 9 ft²

$20 / 1yd² = ($20 / 1yd²)(1yd² / 9ft²) = $2.22 per square foot