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PSAT Math Diagnostic Videos 41 videos
PSAT 1.10 Math Diagnostic. Which of the following is a factor of the expression?
PSAT 1.3 Math Diagnostic. Which of the following most nearly represents the line of best fit?
PSAT 1.4 Math Diagnostic. Which of the following conclusions is supported by the data in the graph?
PSAT 1.31 Math Diagnostic 177 Views
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Description:
PSAT 1.31 Math Diagnostic. Which of the following must be equivalent to the equation?
More Video DetailsTranscript
- 00:00
Thank you We sneak And here's your smoke too Sure
- 00:05
brought to you by equivalent expressions like how good morning
- 00:09
in america means the same thing as bugger off in
- 00:13
england We really need to take a trip back there
- 00:15
one day Everyone's So friendly All right which of the
Full Transcript
- 00:17
following must be equivalent Tio this thing's equals a b
- 00:20
over tea and hear the potential answers there Okay so
- 00:24
we're looking for something that's equivalent to see equals a
- 00:27
b over d i see something that says exactly the
- 00:30
same thing but in a different way Variety is the
- 00:33
spice of life after all Or maybe that's oregano We're
- 00:36
always getting those two Okay first thing will probably want
- 00:39
to do is get that d out of the denominator
- 00:43
on the righthand side So as always we can multiply
- 00:45
both sides to get d somewhere more manageable Doing this
- 00:49
we get cd equals a b Well if cd equals
- 00:53
a b then option c will be true when d
- 00:55
equals one for example But most of the time there's
- 00:58
no way These two will be equivalent So we can
- 01:01
nick see option d looks sort of similar to what
- 01:03
we came up with But it's pulled the old switcheroo
- 01:06
with a and c so it's not d either option
- 01:09
a suggests that c equals d over a b but
- 01:11
isolate see we'd have to divide Both sides are new
- 01:14
equation by d and we'd wind up with exactly what
- 01:17
we started with a b over D is definitely not
- 01:20
the same thing as thie over a bee so we're
- 01:22
not going to be taken in by option a is
- 01:24
charms however if we divide both sides by sea we
- 01:28
get b equals a b oversee which is option b
- 01:32
though there's our equivalent expression And by the way any
- 01:34
of you know what it means When someone in ireland
- 01:37
says yeah we couldn't find it in our irish to 00:01:40.437 --> [endTime] english dictionary anyway so it's no fair
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