10 different groups can ski.
This is a combination of 5 items taken 3 at a time:
Area = Length x Width
63 = 9 x width
Width= 63 ÷ 9 = 7 feet
Answer: 7 feet
➣ Assignment: 
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➣ Answer: 
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Explanation: ↓↓↓↓↓
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➤ [ Step One ] Follow PEMDAS Order Of Operations

➤ [ Step Two ] Rewrite Equation

➤ [ Step Three ] Calculate Within Parenthesis

➤ [ Step Four ] Rewrite Equation

➤ [ Step Five ] Multiply

➤ [ Step Six ] Rewrite Equation

➤ [ Step Seven ] Calculate Exponents

➤ [ Step Eight ] Rewrite Equation

➤ [ Step Nine ] Solve

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Answer:
X = 90 degrees
Y = 40 degrees
Z = 50 degrees
Step-by-step explanation: