Matthew L's TSI Math Cards

If you aren't sure how to solve a problem, what can you do? correct answer: Plug in the answers. Rewrite problem. Draw a picture if relevant. Write down any equations that might be used. Like area of a triangle, circumference of a circle, area of a rectangle, etc. What can help you solve tables, charts, and graphs? correct answer: Write down numbers from the graph instead of just keeping the numbers in your head. How do you solve an equation like: 2x² = 10x correct answer: FIRST - move everything to the left 2x² - 10x = 0 SECOND - factor GCF 2x (x -5) = 0 THIRD set each factor = 0 2x = 0 and x - 5 = 0 x = 0 and x = 5 When substituting numbers or variables, what should you do? correct answer: put them in parentheses EX if b = 2x + 3, then b² = correct answer: EX if b = 2x + 3, then b² = (2x+3)(2x+3)= 4x² + 6x + 6x + 9 b² = 4x² + 12x + 9 1/2 * 32 is the same as... correct answer: 1/2 * 32 is the same as... dividing 32 by 2 What can you take the square root of √(x² +y²) OR √(x²y²)? correct answer: We can only take the square root of √(x²y²) and it becomes x*y So we can only take the square root of FACTORS not TERMS. and √(x² +y²) contains terms. What is the difference between simple and compounded