ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
PSAT Math Videos 28 videos
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?
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 1.31 Math Diagnostic 177 Views
Share It!
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
Related Videos
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?
PSAT 1.1 Reading Diagnostic. The main purpose of the first two paragraphs is to...what?
PSAT 2.2 Reading Diagnostic. What is the main rhetorical effect of this phrase in the second paragraph?
PSAT 1.3 Writing Diagnostic. To make the paragraph most logical, sentence 2 in the second paragraph should be placed...where?
PSAT 1.4 Writing Diagnostic. Which choice most effectively combines the two sentences in the underlined portion?