mary pulls weeds for 3 hours and earns $6.80 per hour, mary cts the grass for 2 hours and earned $6.20 per hour, what were mary's average earnings per hour for all 5 hours?
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Answer: she made $6.56 per hour
Step-by-step explanation: You first have to multiply 3x6.80 which equals to 20.4 and then multiply 6.20x2 which gives you 12.4 then you add
20.4 + 12.4 =32.8 and you divide that by 5 which turns out to 6.56
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