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Solve a 3×3 System Using an Augmented Matrix (RREF on Desmos Matrix Calc)

January 2, 2021 mathispower4u III. Algebra Videos 2x2, algebra, augmented, calculator, consistent, desmos, echelon, equations, form, independent, james, linear, mathispower4u, matrix, one, reduced, row, sousa, system
This video explains how to solve a system of linear equations by writing an augmented matrix in reduced row echelon form using the Desmos matrix calculator.
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Solve a 2×2 System Using an Augmented Matrix (RREF on Desmos Matrix Calc)

January 2, 2021 mathispower4u III. Algebra Videos 2x2, algebra, augmented, calculator, consistent, desmos, echelon, equations, form, independent, james, linear, mathispower4u, matrix, one, reduced, row, sousa, system
This video explains how to solve a system of linear equations by writing an augmented matrix in reduced row echelon form using the Desmos matrix calculator.
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Solve a Trig Equation in Quadratic Form Using the Quadratic Formula (Cosine, 4 Solutions)

December 3, 2020 mathispower4u IV. Trigonometry Videos 2, approximate, calculator, degree, equation, formula, interval, james, mathispower4u, quadratic, radians, solutions, sousa, trig, trigonometric
This video shows how to solve a trigonometric equation in quadratic form using the quadratic formula.
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Solve a Trig Equation in Quadratic Form Using the Quadratic Formula (Cosine, 2 Solutions)

December 3, 2020 mathispower4u IV. Trigonometry Videos 2, approximate, calculator, degree, equation, formula, interval, james, mathispower4u, quadratic, radians, solutions, sousa, trig, trigonometric
This video shows how to solve a trigonometric equation in quadratic form using the quadratic formula.
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Writing a Linear Inequality of Two Variables from a Graph

November 24, 2020 mathispower4u III. Algebra Videos algebra, check, coordinate, determine, false, graph, inequality, james, linear, ordered, pair, plane, solution, sousa, true, two, variables, write
This video explains how to write a linear inequality in two variables from the graph of the solution.
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Determining Solutions to Linear Inequalities of Two Variables from a Graph

November 24, 2020 mathispower4u III. Algebra Videos algebra, check, coordinate, false, graph, inequality, james, linear, ordered, pair, plane, solution, sousa, true, two, variables
This video explains how to determine if an ordered pair is a solution to a linear inequality in two variables from the graph of the solution.
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Ordered Pair Solutions to Linear Inequalities of Two Variables

November 24, 2020 mathispower4u III. Algebra Videos algebra, check, false, inequality, james, linear, ordered, pair, solution, sousa, substitution, true, two, variables
This video explains how to check to see if an ordered pair is a solution to a linear inequality in two variables.
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Determine a Sample Size for a Proportion Confidence Interval Using Desmos

November 18, 2020 mathispower4u XV. Statistics confidence, desmos, desmos.com, formula, interval, james, mathispower4u, proportion, required, sample, score, size, sousa, statistics, z
This video explains how to use Desmos to determine a sample size given a proportion confidence interval.
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Determine a Proportion Confidence Interval Using Desmos

November 18, 2020 mathispower4u XV. Statistics confidence, desmos, desmos.com, formula, interval, james, mathispower4u, proportion, score, sousa, statistics, z
The video explains how to use Desmos to determine a proportion confidence interval.
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Determine a Mean Confidence Interval From Data Using Desmos (t-distribution)

November 18, 2020 mathispower4u XV. Statistics confidence, data, desmos, interval
The video explains how to use Desmos to determine a mean confidence interval from data.
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