Intermediate Algebra | MathHelp.com - By MathHelp.com
00:0-1 | don't be intimidated by the fraction that appears on the | |
00:03 | left side of this equation . We start this problem | |
00:06 | the same way by distributing through the parentheses on both | |
00:10 | sides . So as we distribute this 1/5 through the | |
00:15 | parentheses on the left side of the equation , we | |
00:18 | get 1/5 times Y . Which is why over five | |
00:23 | and 1/5 times negative one , which is negative 1/5 | |
00:29 | On the right . Let's change this -2 to plus | |
00:33 | a negative too , so that we know we're distributing | |
00:37 | a negative too through the parentheses . When we do | |
00:41 | that , the right side of the equation simplifies to | |
00:45 | 6 -8 plus two Y . And notice that we | |
00:51 | can go one step further with the right side of | |
00:53 | the equation as it simplifies to negative two plus two | |
00:59 | Y . Bring down the Y over five minus 1/5 | |
01:07 | and you're ready to get rid of the fractions . | |
01:10 | Since both fractions have a denominator of five , we | |
01:14 | can get rid of the fractions by multiplying both sides | |
01:17 | of the equation by five . Mhm . Oh , | |
01:26 | make sure you distribute the five through both terms on | |
01:32 | both sides of the equation On the left are fives | |
01:37 | cancel , and we're left with Y -1 on the | |
01:44 | right , five times negative two is negative 10 And | |
01:49 | five times positive two y is positive 10 y . | |
01:55 | From here , you should be able to easily finish | |
01:58 | the problem . |
DESCRIPTION:
This lesson covers motion problems. Students learn to solve advanced "motion" word problems -- for example, riding a bike to pick up a car and driving back, or biking part of a trip and taking a boat the rest of the trip. Students should first draw a diagram to represent the relationship between the distances involved in the problem, then set up a chart based on the formula rate times time = distance. The chart is then used to set up the equation.
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