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PSAT 1.1 Math Diagnostic. If a rabbit consumes 3 meals a day, how many grams of food will a rabbit consume in 7 days?
PSAT 1.1 Math Narrative Walkthrough. In how many hours will James and Steve meet?
PSAT 1.10 Math Diagnostic. Which of the following is a factor of the expression?
James and Steve Rowboat Friendship 210 Views
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Description:
PSAT 1.1 Math Narrative Walkthrough. In how many hours will James and Steve meet?
Transcript
- 00:00
Hurry And here's your shmoop du jour Brought to you
- 00:05
by rowboats Someone asked us if we preferred rowing with
- 00:08
one paddle or two And we just told them either
- 00:12
or Yeah James starts from 1 end of lake Not
- 00:17
i got a lot of water and begins rolling across
Full Transcript
- 00:20
the lake at a constant rate of four miles an
- 00:23
hour On the other side of the lake steve starts
- 00:25
thirty minutes after james and rose towards james at five
- 00:29
miles per hour The lake is fifteen point five miles
- 00:32
wide In how many hours will james and steve meet
- 00:36
around the answer to the nearest hundredth of an hour
- 00:38
And here the potential answers All right Not a got
- 00:45
a lot of water Yeah sorry We've just been considering
- 00:48
possible baby names lately and that was one of them
- 00:52
Okay so poor james and steve they desperately want to
- 00:56
hang out but unfortunately there's this great big lake in
- 00:59
between them it's a lake so they could just walk
- 01:02
or drive around it But apparently they prefer to hop
- 01:05
into their respective rowboats and get there the hard way
- 01:08
on mainly to help us out with this word problem
- 01:10
so well more power to him We're told the speed
- 01:13
or rate at which each boat is travelling as well
- 01:17
as the total width of the lake And how much
- 01:19
of a late start steve got putting it all together
- 01:22
How do we figure out when they draw alongside one
- 01:26
another or uh had a head on collision depending on
- 01:28
their aim Okay so for each hour he rose james
- 01:33
goes for miles and steve goes five What we don't
- 01:38
know is how long it took for these two to
- 01:40
meet so let's call the time each person rose up
- 01:43
until that point x well james will have been rowing
- 01:47
for four x miles while steve who was dilly dallying
- 01:50
for thirty minutes before shoving off will have road five
- 01:54
times the quantity x minus point five to represent the
- 01:57
half hour we need to subtract from his time combined
- 02:01
We know they will have covered fifteen point five total
- 02:04
miles And all of this is assuming that neither of
- 02:06
them takes a detour near the hugely popular floating wendy's
- 02:10
Big extra fries are awesome All right now we can
- 02:13
just add our two fellas distances together and set them
- 02:16
equaled a fifteen point five So for x plus five
- 02:20
times the quantity x minus point five equals fifteen point
- 02:25
five that's the magic equation while multiplying crew about a
- 02:28
bit in the middle we get four x plus five
- 02:30
x minus two point five equals fifteen point five at
- 02:33
which point we can add together like terms and add
- 02:35
two point five to both sides tow wind up with
- 02:38
nine x equals eighteen while divide both sides by nine
- 02:41
and x equals exactly two We didn't even need a
- 02:44
round to the nearest hundred There's a question asked you
- 02:47
know a curveball trigger there Nice try buddy Uh we
- 02:50
weren't born yesterday Okay so yeah ideas are answer And
- 02:54
how do we feel about the name Hundreds one hundred 00:02:57.575 --> [endTime] similar that works well Moving on
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