 ## Use cross product to solve proportionsAlgebra, Question of the Day

by on July 13, 2012 with Comments Off on Use cross product to solve proportions comments

A proportion is an equation that compares fractions that are equal. The proportion can be divided into 4 parts, the numerator and denominator of the two fractions. The numerator of the first fraction and the denominator of the second fraction are called the extremes (shown in blue). The denominator of the first fraction and the … ## Solving linear equations – How many solutions can you find?Algebra, Question of the Day, Side Learning

by on June 29, 2012 with 1 comments

Today’s Question of the Day: How many solutions can you find for a system of linear equations? Case 1: Infinitely Many Solutions Solve for x and y. y = 2x – 1 2y = 4x – 2 Answer: Upon first comparison, the equations look different. However, if we divide the second equation by 2, we … ## Order of Operations – Do I add or multiply first?Algebra, Question of the Day, Side Learning

by on June 28, 2012 with 1 comments

Today’s Question of the Day: Have you ever had a problem like this? Simplify 1 + 4 * 3 / 2 – 5 Do you ever find it confusing whether to add to multiply first? Or just don’t know where to start? To simplify in the correct order, we use PEMDAS, which stands for: Parentheses …