Answer:
see below
Explanation:
4 quarts for 12 square yards means the constant of proportionality is 3 square yards per quart.
y = 3x
Fill in x=5 to find the square yards for 5 quarts:
y = 3·5 = 15
Mona can clean 15 square yards with 5 quarts.
3.6m questions
4.7m answers