ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Algebraic Expressions and Equations Videos 12 videos
m varies directly as n. m = 120 when n = 8. What is m when n = 11?
TSI Math: Working with Directly-Related Variables 1 Views
Share It!
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
Related Videos
Which is the best way to revise and combine sentences 1 and 2?
Where would the following sentence best be placed?
Which of the following is best to insert at the beginning of sentence 8?
Which is the best location for sentence 9?
Which of the following sentences is best to insert between sentences 11 and 12?