Answer:
9 feet
Step-by-step explanation:
Since it is a square, the length and width would be the same so the area would be a square number. Therefore, we can square root 81 feet, to get the answer of 9 feet.
Answer:
4x^6
Step-by-step explanation:
Answer:
u = x²
Step-by-step explanation:
4x⁴ − 21x² + 20 = 0
4(x²)² − 21x² + 20 = 0
If we substitute u = x²:
4u² − 21u + 20 = 0
100-50 = 50
50/5.50 = 9.09 so he can invite 8 people plus himself would be 9 total people