What is a One-to-One Function? We say that a function is one-to-one if for all -values, there are unique y-values, or equivalently, there are unique -values. An easy way to visualize this concept is in the case of continuous functions, where they must be strictly increasing or strictly decreasing to be considered one-to-one. One-to-One Sample … Read more
When multiplying and dividing signed numbers, we start by applying the operation to the absolute value of both numbers. If the two numbers have the same sign, the answer will be positive, if the two numbers have different signs, the answer will be negative. Signed Numbers Sample Questions The following rules show that when the … Read more
Return to Discrete Math Videos
The ASVAB Mathematics Knowledge (MK) test examines your knowledge of high-school mathematics principles. To help you prepare for this section of the ASVAB, this page contains everything you need to know, including what topics are covered, how many questions there are, and how you can study effectively. Click “Start Test” above to take a free … Read more
Every year, millions of students apply to college to pursue a higher education and obtain the career of their dreams. Usually, the first step toward these dreams is a college admissions test. The admissions test you take and what scores you need to achieve all depend on your school of choice. Below, you will find … Read more
Circle Calculator Enter any value to calculate the others Radius mmcmmkminftydmi Diameter mmcmmkminftydmi Circumference mmcmmkminftydmi Area mm²cm²m²km²in²ft²yd²mi² Reset Found a bug? Let us know! Knowing how to solve for the area, circumference, diameter, and radius of a circle is an important math concept to understand. Take a look at the examples below to see how … Read more
The Postsecondary Education Readiness Test (PERT) is administered by the state of Florida to adequately assess your academic skills in mathematics, reading, and writing. How well you score on the exam will determine your placement into appropriate college courses. Click the “Start Test” button above to begin our free PERT practice test! These practice questions … Read more
Every year, thousands of high school students across the country prepare for the Scholastic Aptitude Test (SAT). But before they take the SAT, students prepare throughout their high school years by taking the Preliminary SAT/National Merit Scholarship Qualifying Test (PSAT/NMSQT). Click the “Start Test” above to begin your free PSAT practice test! These practice questions … Read more
The ACCUPLACER® placement tests are designed to assist with the accurate placement of students into classes that appropriately match their skill level. The test content is reflective of relevant texts and tasks that would be encountered within a first-year college course. This page covers what information these placement tests cover, the number and type of … Read more
Use this calculator to help you quickly determine any volume of a sphere. Enter the radius of the sphere: Calculate Volume Found a bug? Let us know! Knowing how to solve the volume of a sphere is an important math concept to understand. To find the volume, all you need is the radius! Remember, the … Read more