In Algebra, upper-case delta (Δ) often represents the discriminant of a polynomial equation, usually the quadratic equation. Given the quadratic ax² + bx + c, for example, the discriminant of that equation will equal b² - 4ac, and it will look like this: \Delta = b^2-4ac A di...
Press “F1” to get to the Reset menu. Press the “Right Arrow” key once to access the “RAM” menu and then the “Down Arrow” key once to highlight “Default.” Press the “Enter” to reset the calculator to the factory settings. Press the “Enter” key again when asked to conf...
The TI-84 Plus is one of a series of graphic calculators made by Texas Instruments. In addition to performing basic math functions, such as multiplication and linear graphing, the TI-84 Plus can find solutions for problems in algebra, calculus, physics and geometry. It can also calculate stat...
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A mathematical array is also called a matrix, and is a set of columns and rows that represents a system of equations. A system of equations is a series that uses the same variables in each equation. For example, [3x + 2y = 19] and [2x + y = 11] form a tw
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I then ask students if they can find a place in the equation of a quadratic function that reveals each of these graph features. Standard form clearly shows the y-intercept, factored form gives the x-intercepts (if any), and vertex form indicates the high or low point. We use the “trac...
Press the STAT key (column 3, row 3) followed by the "ENTER" key (column 5, row 10) to select and display the "List Editor" on the screen. Type the list data given below in the "L1" column in the "List Editor" displayed on the screen: 100, 200, 300, 400, 500...
5. Move the cursor to the word CALCULATE with the arrow keys and press ENTER. The screen will change again to show several statistics parameters, including the mean and standard deviation. Record these two parameters to use in the z-score equation. ...