Maria and Ming start at the same point and drive in opposite directions. Maria drives 34 mph and Ming drives 42 mph. How far apart will they be in 2 hours?
A. 110 miles
B. 162 miles
C. 76 miles
D. 152 miles
I do not understand this please help
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OpenStudy (asad786):
34 times 2 =
OpenStudy (anonymous):
wiz 68
OpenStudy (anonymous):
wiz khalifa
OpenStudy (asad786):
yes and now whats 42times 2
OpenStudy (asad786):
the answer is the last one
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OpenStudy (khalilforthewin):
?
OpenStudy (khalilforthewin):
42times2 is 84
OpenStudy (khalilforthewin):
@Asad786
OpenStudy (khalilforthewin):
yea ik then you subtract but it isnt up there
OpenStudy (khalilforthewin):
@Amberpatterson @DaWizjr @k_lynn @MasterprojectHD
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OpenStudy (khalilforthewin):
@israr000
OpenStudy (khalilforthewin):
@chosenmatt
OpenStudy (khalilforthewin):
@crystelle
OpenStudy (khalilforthewin):
@bib
OpenStudy (khalilforthewin):
@bibby
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OpenStudy (khalilforthewin):
@JulieBeans
OpenStudy (khalilforthewin):
@tjb69812
OpenStudy (anonymous):
Its D.
OpenStudy (khalilforthewin):
how
OpenStudy (khalilforthewin):
@welshfella
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OpenStudy (welshfella):
they are driver apart at (34+420 mph
OpenStudy (welshfella):
* 34 + 42 = 76 mph
so you need to find how far they go in 2 hours using this speed
OpenStudy (khalilforthewin):
so its 34time2-42times2
OpenStudy (khalilforthewin):
but that doesnt work
OpenStudy (welshfella):
no - add the speeds then use distance = speed * time
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OpenStudy (khalilforthewin):
ok so it does have something to do with science
OpenStudy (anonymous):
Its D -_-. Because since its (PER HOUR) you would muiltiply 34 and 42 by 2. Then add the sum.
OpenStudy (khalilforthewin):
i thought distance equal speed over time
OpenStudy (khalilforthewin):
@welshfella
OpenStudy (anonymous):
So 34*2 = 68 and 42*2 = 84. 68 + 84 = 152
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OpenStudy (anonymous):
I believe.
OpenStudy (welshfella):
No the 2 speeds are 34 and 42
OpenStudy (khalilforthewin):
did u use the d=speed/time
OpenStudy (welshfella):
oh - i see - yes thats right
OpenStudy (khalilforthewin):
he is right?
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OpenStudy (welshfella):
yes 152 is right
and speed = distance / time
distance = speed * time
OpenStudy (welshfella):
distance = 76 * 2 = 152
OpenStudy (khalilforthewin):
oh ok
OpenStudy (khalilforthewin):
thanks guys
OpenStudy (welshfella):
the 76 comes from adding the 2 speeds 34 and 42
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