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This page provides a list of educational videos related to Using Variables in Formulas. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Using Variables in Formulas.
Math Rotations | MathHelp.com
By MathHelp.com
This lesson covers inverse variation. Students learn that inverse variation is a relationship between two variables in which one variable increases while the other variable decreases. And if the variables are x and y, the following formula can be used to represent inverse variation: xy = k, where k is the constant of variation. Students also learn that the following formula can be used to represent inverse variation between two ordered pairs: x1y1 = x2y2.
Evaluating expressions with variables word problems
By Khan Academy
In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!
Example: evaluate a formula using substitution
By Khan Academy
In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!
Evaluating expressions with variables word problems
By Khan Academy
In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!
Evaluating expressions with variables word problems
By Khan Academy
In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!
Evaluating expressions with variables word problems
By Khan Academy
In this example we have a formula for converting Celsius temperature to Fahrenheit. Let's substitute the variable with a value (Celsius temp) to get the degrees in Fahrenheit. Great problem to practice with us!
Solving Quadratic Equations by Factoring - MathHelp.com
By yourteachermathhelp
This video is a clip of a smaller segment. Students learn to solve quadratic equations by the method of their choice, using the following rules. If possible, use the factoring method. If there is no coefficient on the squared term, and the middle term of the trinomial is even, use completing the square. If there is a coefficient on the squared term, and/or if the middle term is odd, use the quadratic formula. If the variable only appears in the squared term, get the variable by itself on one side of the equation and square root both sides.
Understanding Geometry | MathHelp.com
By MathHelp.com
This lesson covers wind and current problems. Students learn to solve wind and current word problems using a system of linear equations, as demonstrated in the following problem. Into a headwind, the plane flew 2000 miles in 5 hours. With a tailwind, the return trip took 4 hours. Find the speed of the plane in still air and the speed of the wind. The two variables used in this problem are p, the speed of the plane in still air, and w, the speed of the wind. So the speed of the plane with a tailwind can be represented as p + w, and the speed of the plane against a headwind can be represented as p -- w. Note that this problem requires a chart to organize the information. The chart is based on the formula rate times time = distance. The chart is then used to set up the two equations.
Polynomial Inequalities | MathHelp.com
By MathHelp.com
In this example, we’re asked to factor 125p cubed + 1. Notice that 125p cubed is a perfect cube, because 125 is 5 times 5 times 5, or 5 cubed, and 1 is a perfect cube, because 1 is 1 times 1 times 1, or 1 cubed. So we have the sum of two cubes. To factor the sum of two cubes, we use the following formula: a cubed + b cubed can be factored as parentheses a + b times parentheses a squared – ab + b squared. And in this problem, since a cubed is represented by 125p cubed, the value of a is 5p, and since b cubed is represented by 1, the value of b is 1. Notice that the value of a, 5p, has both a coefficient and a variable, so we need to use parentheses around the 5p when we plug it into the formula, in order to keep the 5 and the p together. And let’s go ahead and use parentheses around our x as well, in order to be consistent. So we have bracket parentheses 5p + parentheses 1 closed bracket times bracket parentheses 5p squared + parentheses 5p times parentheses 1 + parentheses 1 squared closed bracket. Notice that we change the parentheses in the formula to brackets so that we’re not dealing with too many sets of parentheses. Next, simplifying inside of the second set of brackets, parentheses 5p squared is 5p times 5p, or 25p squared, 5p times 1 is 5p, so we have – 5p, and parentheses 1 squared is 1, so we have plus 1. And changing the brackets back to parentheses, we have parentheses 5p + 1 times parentheses 25p squared – 5p + 1, which is our final answer.
09 - The Quadratic Formula Explained, Part 1 (Practice Problems & Solutions)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
01 - The Distance Formula, Pythagorean Theorem & Midpoint Formula - Part 1 (Calculate Distance)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
10th Grade Modeling with Systems of Equations
By
10th grade math lesson on modeling with systems of equations. The lesson involved high school modeling standard A.CED.A.2 from the MA Curriculum Frameworks for Mathematics, which specifies creating equations in two or more variables.
Writing Equations of Ellipses In Standard Form and Graphing Ellipses - Conic Sections
By The Organic Chemistry Tutor
This algebra video tutorial explains how to write the equation of an ellipse in standard form as well as how to graph the ellipse when in standard form. It explains how to find the coordinates of the foci, vertices, and co-vertices. This video contains plenty of examples and practice problems.
01 - Direct Variation and Proportion in Algebra - Part 1 (Constant of Variation & More)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
12 - What is Exponential Growth & Decay? (Half Life & Doubling Time) - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Antiderivatives
By The Organic Chemistry Tutor
This calculus video tutorial provides a basic introduction into antiderivatives. It explains how to find the indefinite integral of polynomial functions as well as rational functions.
