Algebra 1 – Progress as of Friday, March 8

Mid semester grades will be entered into Webadvisor based on your grade point average as of Saturday, March 16.

As of Friday, March 8, we finished Chapter 3 and we took Exam 2 in class.  This means you need to complete all the Chapter 3 Homework and Quizzes.

Students who didn’t show up for the in class exam received a 0 for Exam 2. If you don’t like the grade you earned on the in class Exam 2, you may take it at home to improve your grade by Friday March 15, 11:59pm

To give you an accurate reflection of what your grade is as of now, all work that should be completed, but isn’t, has been issued a zero.  Your grade average in mymathlab will reflect that.  Now of course if you do those homeworks and quizzes, whatever grade you get will overwrite the zero.  So get that work done!

 

Algebra 2 – Progress as of Friday, March 8

Mid semester grades will be entered into Webadvisor based on your grade point average as of Saturday, March 16.

We  completed Homework 7.5.  You should finish HW7.1, 7.2, 7.3, 7.4, and 7.5 as well as Quiz 7A and 7B.

To give you an accurate reflection of what your grade is as of now, all work that should be completed, but isn’t, has been issued a zero.  Your grade average in mymathlab will reflect that.  Now of course if you do those homeworks and quizzes, whatever grade you get will overwrite the zero.  So get that work done!

 

Algebra 2 – The “Magic Number” Technique to Factoring

If your expression was a number other than 1 in front of the squared term, I call that number “magic” because it is involved in a few magical steps to get an answer.

Suppose you’d like to factor this expression:

Step 1: Factor out the GCF if possible. In this example, there is no GCF. You must factor out a GCF before you continue to step 2.

Step 2: Convert the expression to one where the squared term has a coefficient of 1. Do that by stripping the squared term of its current coefficient, in this case 15 and call that number the “magic number“.

Create another expression that has a squared term, the same middle x term, and the last constant being the magic number multiplied by the original constant. Here is the new expression to deal with:

Step 3:  Factor the new “simplified” expression to get

Step 4: Using the “magic number”, which in this case is 15, make fractions out of the numbers generated in step 3. Here is the expression:

Step 5: Simplify the fractions. This is the result of the simplification:

Step 6: If you still have fractions after simplifying the fractions, move the denominations of those fractions to the front of the variable. Here’s what we get:

That’s it! That is your answer! Neat huh?

Math – Silvestri’s Special Apps Center!

Check out:   https://cs.stcc.edu/specialapps/

I have some ideas for apps to add to this website, so please visit every now and then.

If you have an idea for an app that you think would be useful, would benefit a student, or would make the world a better place, please share ( silvestri@stcc.edu ), and if it isn’t too involved, and I have the time, I’ll code the problem and make it a special app.

Algebra – Welcome to Professor Silvestri’s Algebra Courses

  • There are math lecture videos based on our textbook.  You can access them here:    Algebra Videos      (This is STCC’s portal website.  You’ll need to login with your Webadvisor credentials.) If you miss a class or need another prospective on the material, give these videos a try.
  • To take these courses, you must have access to a computer as this will be a hybrid lecture / online study course.  We will be using http://www.mymathlab.com/. So you must purchase the Student Access Code package and register using the appropriate Course Code (ID) shown above.
  • (Optional Textbook)  Introductory Algebra through Applications, 3rd Edition, Akst and Bragg, 2012, Pearson Education, ISBN: 9780321746696algebratext
  • (Free Textbook)  Bedinelli Algebra 1 Textbook
  • (Free Textbook)  Bedinelli Algebra 2 Textbook