# Recent Posts

Title Description Creator created
Draw Formula Graph Pass in the formula and draw its graph Dr. Osama M. Khaled Nov 23, 2023 01:49 PM
Simplify algebraic expressions and equations Dr. Osama M. Khaled Nov 19, 2023 05:00 AM
Simplify expressions to solve equations When solving equations, we should simplify the expressions that make up the left and right sides before applying any properties of equality. Often, that involves removing parentheses and/or combining like terms. Dr. Osama M. Khaled Nov 18, 2023 10:07 PM
Use more than one property of equality to solve equations More complicated equations may require using more than one property to solve it. Dr. Osama M. Khaled Nov 07, 2023 07:28 AM
Use the division property of equality Dividing both sides of an equation by the same nonzero number does not change its solution. Dr. Osama M. Khaled Nov 04, 2023 09:27 AM
Video ... 5 User Story Pitfalls There are common mistakes which BAs do while writing the stories. This short videos explains the 5 most common ones Dr. Osama M. Khaled Aug 30, 2020 06:48 AM
Video ... 10 points that can ensure you capture value of business requirements Capturing value in the requirements is very important. However, many BAs just ignore it and rather focus on the requirements not the value out of it. In this video, you will learn 10 points which will help you capture value of the requirements ensuring that you will be delivering really what is asked from you in a way that satisfies your stakeholders Dr. Osama M. Khaled Aug 30, 2020 06:51 AM
What are the trade-off choices between performance and security? A trade-off decision that many solution architects struggle to make is what requirements to compromise if security and performance requirements conflict? Something which I saw many times in my long career. One point of view is that good user experience is linked primarily to the performance of the system since it does make sense to provide good functionality but without a responsive system. On the other hand, some architects would see that providing a maximum level of security would give a better user experience. This may be true, but have they considered system performance while adding all security measures? Dr. Osama M. Khaled Sep 22, 2020 10:45 PM
Variables and Memory Optimization When you start coding, you need to be mindful to memory usage and leakage. Dr. Osama M. Khaled May 27, 2021 10:40 PM
Make a phone number callable in Android You may want to present a number and make it callable. Dr. Osama M. Khaled May 23, 2021 11:36 AM
Check if a string is Null or Empty It is sometimes not practical to work out a string object immediately before validating if it is null or not Dr. Osama M. Khaled May 17, 2021 09:58 PM
Check if a string has a white space at any position It is important sometimes to check a string and make sure that it does contain a white space (e.g. space, new line, tab, etc ...). Dr. Osama M. Khaled May 21, 2021 12:00 PM
An efficient way to delete an item from a dynamic list It is sometimes tricky working with linked lists if you are searching for an item to delete it. Dr. Osama M. Khaled May 23, 2021 09:10 PM
About Dr. Osama M. Khaled Aug 14, 2022 03:19 AM
Postal Rates Data are often presented in tables, with information organized in rows and columns. This exercise will give you the basic concepts of reading a table to find a piece of information. Dr. Osama M. Khaled Oct 02, 2023 07:35 AM
Use the multiplication poperty of quality Multiplying both sides of an equation by the same nonzero number does not change its solution. Dr. Osama M. Khaled Sep 29, 2023 07:32 PM
Multiply fractions To multiply two fractions, multiply the numerators and multiply the denominators. Simplify the result, if possible Dr. Osama M. Khaled Sep 21, 2023 02:26 AM
Use the subtraction property of equality Subtracting the same number from both sides of an equation does not change its solution Dr. Osama M. Khaled Sep 20, 2023 08:53 PM
Exercise 2: Concepts Practice the essential concepts to simplify algebraic expressions Dr. Osama M. Khaled Sep 20, 2023 11:45 AM
Identify corresponding angles, interior angles, and alternate interior angles A line that intersects two coplanar lines in two distinct (different) points is called a transversal Dr. Osama M. Khaled Sep 18, 2023 11:22 AM
Identify and define parallel and perpendicular lines Parallel lines are not intersecting while perpendicular lines are intersecting and form a right angle Dr. Osama M. Khaled Sep 17, 2023 11:24 AM
Equivalent Fractions Fractions can look different but still represent the same part of a whole. Dr. Osama M. Khaled Sep 15, 2023 11:28 PM
Round whole numbers When we don’t need exact results, we often round numbers Dr. Osama M. Khaled Sep 14, 2023 06:01 AM
Use the addition property of equality Adding the same number to both sides of an equation does not change its solution. Dr. Osama M. Khaled Sep 13, 2023 04:08 AM
Exercise 1: Vocabulary Practice some essential vocabulary when you simplify algebraic expressions Dr. Osama M. Khaled Sep 12, 2023 11:46 PM
Determine whether a number is a solution An equation is a statement indicating that two expressions are equal Dr. Osama M. Khaled Sep 12, 2023 07:03 AM
Exercise 6:Translate to algebraic expression Abstract the words into concrete algebraic expressions Dr. Osama M. Khaled Sep 11, 2023 08:13 PM
Exercise 1: Guided Practice An exercise showing how percents could be used in practical situations Dr. Osama M. Khaled Sep 11, 2023 05:50 AM
Write fractions as percents We use a two-step process to write a fraction as a percent. First we write the fraction as a decimal. Then we write that decimal as a percent. Dr. Osama M. Khaled Sep 09, 2023 01:00 AM

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