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PSAT 1.1 Math Narrative Walkthrough. In how many hours will James and Steve meet?
PSAT 1.2 Math Narrative Walkthrough. Which graph represents the equation?
PSAT 1.3 Math Narrative Walkthrough. How many full packages of secret ingredient does the company have to buy to make one 50-gallon batch?
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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