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PSAT Math Diagnostic Videos 41 videos

PSAT 1.10 Math Diagnostic
256 Views

PSAT 1.10 Math Diagnostic. Which of the following is a factor of the expression?

PSAT 1.3 Math Diagnostic
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PSAT 1.3 Math Diagnostic. Which of the following most nearly represents the line of best fit?

PSAT 1.4 Math Diagnostic
216 Views

PSAT 1.4 Math Diagnostic. Which of the following conclusions is supported by the data in the graph?

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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?


Transcript

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

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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