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Elementary Algebra and Functions Videos 36 videos
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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
Full Transcript
- 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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