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TSI Math: Working with Directly-Related Variables 1 Views


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Description:

m varies directly as n. m = 120 when n = 8. What is m when n = 11?


Transcript

00:02

All right sy mash bumpers got another weird question for

00:05

you Here we go in there ese Directly as in

00:09

them e m is one twenty one and it's eight

00:12

What is m when n is eleven And varys directly

00:20

as in what does that mean Well it means that

00:22

eminent are related by the equation M equals k times

00:26

and meaning kay is a numerical constant which we need

00:30

to find Yeah surprise surprise So when are we not

00:33

solving for variables Well the fact that emma's one twenty

00:36

when n is eight allows us to find kay and

00:39

then we just kind of have a simple ratio Here

00:41

we just plugged the values of m and and into

00:44

the equation M equals k times and and we get

00:47

one twenty is kate times eight Well we just divide

00:50

both sides by eight tow isolate k There k is

00:53

one twenty over eight which is fifteen So now that

00:55

we know okay well we confined m when and is

00:59

eleven We just plug everything in wright's fifteen times eleven

01:03

it's one sixty five and that's it The answer is

01:05

the sometimes the wording of these questions is way more

01:08

complicated than the math on why they do that They 00:01:11.257 --> [endTime] want a tricky of their kind of evil

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