2007 state questions

[smeag]

can you please show me your solutions for number: 26, 27, 28, 39, 46, 47, 48?
Thanks!
By the way I really need help on the geometry problems such as 39.

[smeag]

sorry but just a little more, 36, 37, 38.

[Shawn]

All solutions to 2007 UIL I release:
26) [unparseable or potentially dangerous latex formula]
27) Systems of equations
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Substitute to get to two variables:
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We have a system now
[unparseable or potentially dangerous latex formula] and
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Use matrices rref function to solve system
so rref((7,4,49)(11,55,418))
[unparseable or potentially dangerous latex formula]
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[Shawn]

28)
Find area in square miles
[unparseable or potentially dangerous latex formula]
Find perimeter
[unparseable or potentially dangerous latex formula]
Multiply by 4, since 4 strands all the way around
[unparseable or potentially dangerous latex formula]

[Shawn]

39) [unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

Note on circles: A quick search will result in numerous different formulas, which are in the mannual. I use two formulas for scalene though.
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[smeag]

Um, thanks but I don't think you are doing the right test. Here is the link: http://texasmath.org/DL/CA/CA07E.pdf

[Shawn]

A lot of these questions have already been answered here in the past, so you might be able to find what you are looking for through the search function.
46) Basic scaling
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[smeag]

yeah, so what test are you doing? So that your efforts won't be in vain?

[Shawn]

TMSCA state? Yes. Ok I will take a look.

[Shawn]

THE 2007 State Test (UIL I release)

[smeag]

Oh, I was doing the test 07E (state) sorry...
so, basically my questions are from this test...

[Shawn]

Everything below this is UIL E (TMSCA state):
26) find intersection (system of equations)
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[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

27) Leash problem
Imagine picture: 30 foot R half circle (This side of fence)
Then to get through opening 10 foot R half circle.
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

28)
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Right Triangle
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
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Hopefully you know how sig figs work, because I don't like them. You can read the manual or ask someone else for that.

[Shawn]

39) Once again
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I am pretty sure this is a key error, but I could be wrong. I checked it using an # calculator for this kind of problem and it verified my answer.

[Shawn]

46) Do you know how to scale? This problem is always a scaling problem, so always think dimensions. For example, peeling an apple is a square measurement.
[unparseable or potentially dangerous latex formula]
Cross multiply and divide
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

47) Linear regression. Do you use an HP? If so do you know how to do linear regression? I can't really help you here without knowing these things. Once you respond I will edit this post to reflect what you need to know.

[Shawn]

48) Equation Solver. What calculator(s) do you use? If HP or TI-89 do you know how to use equation solver? Once I know this, I can help you out more. I will edit this post to help you out when I know these things.

[smeag]

I use an hp33 for the numericals, and a ti-83 for all the geometry and stated.

[smeag]

also , can you help me on 36, 37, 38? I find these to be the hardest stated problems next to the last ones (67,68,69)

[Shawn]

36) Compound interest problem
For this use equation solver. (Maybe not best way, but way I would do it). Just as above, if you don't know how to use the equation solver, let me know your calculator and I can probably try to help you figure out how to use it.
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

[Shawn]

37) Draw it and use your knowledge of geometry (someone else can do this one I don't like these problems, therefore couldn't explain it well)
38) Physics! Such a great problem.
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[unparseable or potentially dangerous latex formula]

[Shawn]

That is it except the boat problem right? On the regression and equation solver, once I know where I need to start (depending on whether you are familiar with the HP features or not) I will post those.