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What's a Ratio?
Fractions are ratios. What? Yes! A ratio is a comparison of numbers, and a fraction is a way to write a ratio. There are a couple of other ways to write a ratio. Do any come to mind? Can ratios be found in the real world? Yes!...
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What are Equivalent Ratios?
Work through a word problem with the help of a video tutor. You'll learn how equivalent ratios are just like equivalent fractions. Write a ratio as a fraction, reduce each ratio, then determine if they are the same. It's as simple as that!
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How Do You Use Dimensional Analysis to Convert Units on Both Parts of a Rate?
The video just before this lesson showed how to do unit analysis and rate conversions. This lesson also shows conversion of unit rates, feet, miles, seconds, hours. So pay attention and learn how to figure out how many feet per second...
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How Do You Set Up a Proportion from a Word Problem?
In this word problem, the skill to remember is to match up the similar measurements. This means the inches match up with the inches and the feet match up with the feet measurements. This problem is a ratio and is written as fractions....
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How Do You Determine if Two Ratios are Proportional Using Cross Products?
Are these two given ratios proportional? One quick and easy way to answer this question is to cross multiply the two values. If the products are equal then they are proportional ratios. If they are not equal then they are not...
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What is the Formula for the nth Term in a Geometric Sequence?
What is the difference between an arithematic sequence and a geometric sequence? In an arithematic sequence the constant ratio is added, and in a geometric sequence the constant ratio is multiplied. Watch this video and learn how to use...
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How Do You Write a Rule for a Geometric Sequence?
Learners can review how to write a rule for the geometric sequence 2, 4, 8, 16. The tutor explains through direct instruction how they can use the rule to find the 6th, 9th, and 15th terms. This clip is best suited for individuals who...
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What are Equivalent Fractions?
Check this out! Make equivalent fractions by multiplying or dividing a given value. It's a useful skill to have in math. Watch this video as the instructor demonstrates several ways to get equivalent fractions.
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What is a Scale Drawing?
Scale drawings are an easy and plausible way to represent large things, such as roads and buildings, on paper. This tutorial explains what a scale drawing is and uses the example of a house to demonstrate how a scale drawing works. It...
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How Do You Find Equivalent Ratios?
Ratios are a comparison of numbers. So given a ratio, how can an equivalent ratio be written? Just multiply or divide, both the numerator and the denominator, by the same value. The result will be different numbers, but equal values that...
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How Do You Find a Missing Side of a Right Triangle Using Cosine?
Trigonometry? What's trigonometry. Well, something to do with triangles, right? Right! Right triangles! In this problem, find the missing length of one of the sides. So set this up as a ratio: cosine(A) = adjacent side length divided by...
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How Do You Solve a Word Problem by Dividing Monomials?
A word problem, a triangle, monomials, exponents, what to do? The instructor explains how to set up this ratio in order to solve the problem and express it as a monomial in simplest form.
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What's a Proportion?
Proportions are representations of equal ratios. Ratios can be expressed in many ways and still be of equal value. Think of all the ways to write one half. Endless ways. These are all proportional ratios. Watch the video and see.
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What are the Means and Extremes of Proportions?
What's a proportion? Is it a comparison of fractions? Are the fractions of equal value? Is it a ratio? Are the ratios equal? Watch this video and see the instructor explain the answers and she will tell the special names for the terms in...
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Solving Word Problems with Percents
There are 20 kids on a bus, 60% of them have blue backpacks. How many is this? The teacher shows how to solve a percentage word problem using proportion ratios.
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Percent Tip
How much am I supposed to tip for this meal? Many have asked this question. The instructor uses a visual to first set up the known numbers and then writes the ratios to solve the problem.
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Percent Tax
Learn how to set up a proportion to determine how much additional tax you have to pay for an item.
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Percent Discount
The concept of percent discount is very clearly explained in this informative tutorial. Learners will work through a real life discount problem using algebraic reasoning and a clearly outlined procedure. This is a good video.
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Map Scale and Ratios
Introduce you map scale and ratios lesson with this informative video. A student demonstrates how to properly use a scale on a map, as well as read a topographic map. This is a fantastic video to show during your map unit!
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How Do You Solve a Problem Using Indirect Measurement with Shadows?
Using indirect measurement, this video shows viewers how to find the height of a flagpole. The lecturer employs drawings as well as proportions to solve this problem, explaining each step. A useful resource to aid struggling learners and...
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How Do You Solve a Problem Using Indirect Measurement with Shadows?
Using indirect measurement, this video shows viewers how to find the height of a flagpole. The lecturer employs drawings as well as proportions to solve this problem, explaining each step. A useful resource to aid struggling learners and...
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How Do You Determine If Two Ratios are Proportional by Reducing?
Working on proportional ratios in your class? This video might be for you! An instructor takes a step-by-step approach to reducing and comparing two ratios in order to determine if they are proportional. A clear video, this resource...
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How Do You Determine if a Sequence is Arithmetic or Geometric?
Learners who view this video should gain a better understanding of the difference between a geometric sequence and an arithmetic sequence. The video includes an example of each, with step-by-step instructions on how to figure out which...
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What is a Scale Drawing?
Scale drawings are an easy and plausible way to represent large things, such as roads and buildings, on paper. This tutorial explains what a scale drawing is and uses the example of a house to demonstrate how a scale drawing works. It...