Answer:
57 × 10 will give you 5700, as well as 285 × 20.
Answer:
x+y=1+3
Step-by-step explanation:
The Second Choice I think
1647. 1 hour=60 minutes. John can mow 247 square feet per minute, so he can mow 60*247=14820 square feet per hour. 1 yard=3 feet, so 1 square yard =3^2=9 square feet, so in the same duration of time, John can mow 14820/9=1647 square yards (approximately) per hour.
