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Topic: Pre-Service Math Teacher Training
Replies: 10   Last Post: May 3, 2010 3:21 PM

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Brent Neeley

Posts: 12
Registered: 1/26/08
Systems of Equations/Inequalities in Alg 2 Trig
Posted: May 1, 2010 6:48 AM
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I just finished algebraic systems of equations and I incorporated absolute
value, radical, fractional (which turned into a 4th degree factorable
trinomial) and exponential(method of common bases) equations.
It was a great review, even though that material didn't appear to be in the
curriculum.

Now I'm ready to to systems of eqns and ineq. graphically and thought I
could incorporate some circle eqns that need to be put in ctr-rad form
first, exponential and log curves, etc.
I'm thinking I could also review functions, one to one and onto, domain,
range etc. as we do these problems.
However, when I looked at the curr. I couldn't find solving sys of eqns
graphically. So my questions are:

Is solving sys of eqns graphically in the curriculum?

If so, do students need to be able to find intersection points on their
calculators?

Also, as far as sys of inequalities go I'm not sure what's being asked in
Sample Task A2.A.4b

Solve the following sys of ineq graphically. Express solutions rounded
to the nearest hundredth. Explain how the solutions to the 2 problems are
related.
x^2-3x > or = 8 + y
x^2-3x < 8 + y
I understand I could graph the parabola y = x^2 - 3x - 8 and shade
appropriately, but how would you "express the solutions"?
Ideas???


Thanks,
Brent Neeley
Hornell HS


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