To find out how much Isabella's dad spent at the bowling alley, we can calculate the total cost of the adult game, child games, and arcade tokens separately and then sum them all up.
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Cost of 1 adult game: \[ 1 , \text{adult game} = 1 \times 7.00 = 7.00 \]
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Cost of 6 child games: \[ 6 , \text{child games} = 6 \times 3.50 = 21.00 \]
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Cost of 20 arcade tokens: Since 10 arcade tokens cost $4.00, we can find the cost of 20 tokens: \[ 20 , \text{arcade tokens} = 2 \times 4.00 = 8.00 \]
Now, we can add these costs together: \[ \text{Total cost} = 7.00 + 21.00 + 8.00 = 36.00 \]
Therefore, Isabella’s dad spent a total of $36.00 at the bowling alley.