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Comparing rates
By Khan Academy
Finding a unit rate is a skill often required in real life. How fast is that plane flying? How many lawns can you mow in an afternoon? You see, with our knowledge of ratios and fractions, we can now solve unit rates problems like this.
Compare the growth rates of exponentials and polynomials
By Khan Academy
Sal discusses two functions that model the shipment rate of cars. One function is quadratic and the other is exponential. Which one will eventually exceed the other?
Basic Rate Problem
By Khan Academy
This is a basic rate problem where the student is given a table with data and asked to find the rate of travel for 4 trains in order to compare their speed.
Which is the Better Buy? (CCSS 6.RP.A.3b)
By mathtrain
Which is the better buy? We will calculate the unit price (rate) of each item to compare.
CCSS 6.RP.A.3b
Average rate of change word problems
By Khan Academy
Sal compares the average rates of a change of a function that models temperature for different time intervals.
Solve Problems Involving Rates and Ratios
By Khan Academy
Watch this video as the instructor clearly explains how to solve a word problem involving finding unit rates. When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. See how you can apply this process to help you solve similar problems.
Speed translation | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
This video takes us through some more advanced unit conversion problems. Here, we can see how to make multiple conversions in the same problem concerning speed. Take particular note of how the units change in each step. More importantly, note how, step by step, our units slowly change into the units we want for our final answer. If you are having trouble understanding why this happens, go to the key concept described at 2:20 in the video. Note that this only occurs when multiplying two quantities, not when adding them!
Rates and ratios
By MathPlanetVideos
Express the ratio as a fraction in simplest form and as a decimal
Finding average speed or rate | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
Using the formula for finding distance we can determine Usian Bolt's average speed, or rate, when he broke the world record in 2009 in the 100m. Watch.
eSpark Learning: Compare and Contrast Reading Strategy Instructional Video (8.RI)
By eSparkLearningVideos
This video explains how to compare, contrast, and then evaluate information in two texts on the same topic. It reviews the evidence, structure, and the media or text features of two passages on being a vegetarian.
Reading Comprehension Strategies: Compare and Contrast
By Anovellife
"Compare and Contrast. Compare and Contrast.If they are the same, they go in the middle, and if they are different, they go on the sides."
Example: The six trig ratios
By Khan Academy
Worked example where we walk through finding the major trig ratios
Trig Ratios - Part 2
By Papapodcasts
This is a video lecture course on Basics of Trigonometry and Geometry.
Trigonometry - The Trig Ratios, sin x, cos xand tan x : ExamSolutions
By ExamSolutions
In this tutorial you are shown how the sin, cos and tan ratios compare two sides of a right angled triangle.. You need to know this before calculating lengths and angles of right angled triangles. To see this video and other go to ExamSolutions at http://www.examsolutions.co.uk/
Trig Ratios - Part 1
By Papapodcasts
This is a video lecture course on Basics of Trigonometry and Geometry..