To find out how much money Jaden will earn for 4 lawn-mowing jobs and 6 pulling-weeds jobs, we can substitute \( l = 4 \) and \( w = 6 \) into the equation \( 25l + 20w \).
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Substitute the values into the equation: \[ 25l + 20w = 25(4) + 20(6) \]
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Calculate \( 25(4) \): \[ 25(4) = 100 \]
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Calculate \( 20(6) \): \[ 20(6) = 120 \]
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Add the two results together: \[ 100 + 120 = 220 \]
Therefore, Jaden will earn $220 for 4 lawn-mowing jobs and 6 pulling-weeds jobs.