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A short reminder of how to reduce first and then multiply two numerical fractions. Then we apply the same priciples to reducing like factors in an example with more than one variable and numerical…
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This shows four examples just to cover a variety of "looks". There is at least one of each tyoe,
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A brief description of the difference between rational and irrational numbers followed by examples of number in both categories.
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Single fractions set equal to each other forms a proportion. When presented with this, it can be "cross multiplied" to eliminate the fractions. The resulting equation has a term with the…
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This shows the last step in simplifying a rational expression, i.e. dividing out factors that reduce to one.
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For an equation with f(x) equal to a rational expression, this shows how to write the substitution and simplification when putting in a particular value for x.
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A quick example of reducing a fraction by dividing matching factors on the top and bottom.
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Rate X Time = Distance problems are best organized by making a table with the columns labeled with the parts of the formula r x t = d and the different scenarios labeling the rows. Then the…
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This demonstrates testing possible answers to a system of two equations to see whether they are truly answers or not. Note that each answer has to work for both equations, but if it doesn't…
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Using the proportion %/100 = Amount/Base to plug in what's given to find what is asked for.
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Just showing how to locate different fractions on a number l ine
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Shows how to convert factors with negative exponents into ones with positive exponents and then how to apply the product and quotient rules to combine the exponents of factors with the same base.
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This video defines the terms ratio and proportion and then demonstrates how to use a proportion to solve an applicable word problem.
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