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TSI Mathematics Videos 144 videos

TSI Math: Writing the Slope-Intercept Equation of a Graphed Line
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What is the equation of the line graphed above?

TSI Math: Plugging in Slope and Point to Find the Equation of a Line
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A line passes through the point (-4, -4) and has a slope of . What is its equation?

TSI Math: Using Intercepts to Find the Slope of a Line
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Line A has an x-intercept of -4 and a y-intercept of 8. What is its slope?

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TSI Math: Using Distance and Rate to Solve for Time 7 Views


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Description:

Driving at an average speed of 40 miles per hour, approximately how many minutes does it take Roberto to travel to a town that's 52 miles away?


Transcript

00:02

Okay sy Math from uppers Next up driving in an

00:04

average speed of forty miles an hour approximately how many

00:07

minutes does it take roberto to travel to a town

00:09

that's fifty two miles away Time to get dirty that's

00:18

d rt wide to be precise D stands for distance

00:21

r stands for raid and t stands for time distance

00:25

equals rate times time right That's one of the famous

00:28

old formulas we love All right so we have a

00:30

distance and a rate and we're solving for time We

00:32

got fifty two that's Our distance equals forty miles an

00:35

hour times that time How many minutes So to figure

00:37

out the time they're weeds divide both sides by forty

00:39

to find that tea is fifty two over forty and

00:43

that's one point three it was at one point three

00:45

minutes or one point three hours Well the town's fifty

00:48

two miles away It's pretty far for a one point

00:51

three minutes unless you're superman or something So one point

00:54

three is in units of hours and since our rate

00:57

is in miles per hour in their sixty minutes in

01:00

an hour at least still in california for they dial

01:03

that back so one point three hours is one point

01:05

three times sixty or seventy eight minutes And the answer

01:08

is d and that was elegant way to solve it

01:10

but you could've solved for how long it took you

01:13

to go one mile and then multiply the whole thing

01:15

out But we didn't need to do that here Okay 00:01:17.663 --> [endTime] We're done

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