To solve the expression \( 15 \cdot 8^0 / 5 + 4(7^0 - 6) \), we will simplify it step by step.
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Evaluate \( 8^0 \) and \( 7^0 \):
- Any non-zero number raised to the power of 0 is 1. Therefore:
- \( 8^0 = 1 \)
- \( 7^0 = 1 \)
- Any non-zero number raised to the power of 0 is 1. Therefore:
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Substitute the values into the expression: \[ 15 \cdot 1 / 5 + 4(1 - 6) \]
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Simplify \( 15 \cdot 1 / 5 \): \[ 15 / 5 = 3 \]
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Simplify the second part \( 4(1 - 6) \): \[ 1 - 6 = -5 \] Now multiply by 4: \[ 4 \cdot (-5) = -20 \]
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Combine both parts: \[ 3 - 20 = -17 \]
Therefore, the value of the expression \( 15 \cdot 8^0 / 5 + 4(7^0 - 6) \) is \(\boxed{-17}\).