Add up the 84 and 42 to get 126, then divide by 6 to get the number of tables which is 21. And the number of seats is 126 because you would need a seat for every person. Hope this helps.
Multiplication would be first
Circumference = πD
πD = 56.52
D = 17.99 in
Area of the pizza = π (17.99 ÷ 2)² = 254.19 in²
Area of the pizza eaten = 254.19 ÷ 4 = 63.55 in²
Area of the pizza remain = 254.19 - 63.55 = 190.64 in²
Answer: 190.64 in²
Regroup terms:
y - 2/9 ≤ 5/9
Add 2/9 to both sides:
y ≤ 5/9 + 2/9
Simplify 5/9 + 2/9 to 7/9:
y ≤ 7/9