Honors Core 3--- Week of December 5-9

Monday, 12/5
We looked today at Investigation 1 - a review of solving linear equations (and inequalities).
page 226-227: #1-5
Homework #40:  page 237 #1 - show a check for each solution

Tuesday, 12/6
We continued our look at solving inequalities with the focus: What patterns regarding equation solving can we apply to solving inequalities?  Which can we not apply?
page 227: #6-7, 8
SUMMARY:  When solving inequalities, if you divide by a negative number (coefficient of x), you must change the inequality sign.  (< to > or vice versa)  You can avoid this IF you always keep the x positive.
TWO DEMONSTRATIONS:  MathTV - look under "algebra", then "inequalities" (it's down the bottom of the list).  Choose #1 or #2.    KhanAcademy - this one is long and has several different (progressively more difficult) examples.
Homework #40:  I re-assigned (gave more time for) #40 because I wanted to make sure that all solutions were checked, especially in regards to the new "rules" we uncovered today.

Wednesday, 12/7
Introduction to Quadratic Formula:  How can we solve a quadratic equation if is doesn't factor?
page 229 #1-3... focus on #3!
In case you were absent or didn't have a chance to finish checking your answers in class, here are the answers to #3:
a.)  a= -50,  b=2600,  c= -22,500
b.) 26
c.) -15.03
d.) x=10.97 & x=41.03
e.) You can check by...
      - setting your table to the answers and see if the y-value is almost 0
      - calculate the roots on your calculator graph
      - plug your answers back into the original equation; you should get very close to 0
f.) x=10.97 & x=41.03 (same as part d)
DEMONSTRATIONS:  Our problems today were pretty straightforward.  The links below should be a good refresher...
   MathTV - Today's big idea is right on the home page!  Quadratic Equations & Solve Using Quadratic Formula.... choose #1
  KhanAcademy -
Homework #41 - It's just like problem #3 that we did in class.
page 231 #5


Thursday, 12/8
Practice using quadratic formula:  page 231 #6
Homework #42 - page 234 OYO(a)


Friday, 12/9
Graphing the parts of the quadratic equation... page 232 #7

PAGE 232: #7

            Put the answers to the nquestions in your spiral and mark it as important!

PAGE 232: #7

            For each equation a-d, use the quadratic formula to calcuclate the zeros and then show where each of the parts of the quadratic formula lie on the graph.

Homework - turn in any missing assignments on Monday!