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UNO [17]
3 years ago
9

Can someone please help me u can just do 5 and explain please

Mathematics
1 answer:
kkurt [141]3 years ago
3 0

Answer:

i only can explain until number 7

i am sorry

maybe that help you

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After sailing 12 mi, a sailor changed direction and increased the boat's speed by 4 mph. an additional 18 mi was sailed at the i
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Let the speed for the first 12 mi be x mi/h, the speed for 18 mi was (x+4) mi/h
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3=(12+18)/(x+x+4)
3=30/(2x+4)
solving for x we get
3(2x+4)=30
6x+6=30
6x=24
x=4 mi/hr
Answer: 12 mi/hr
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