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Nanukana

Guest

Algebra

Hi, I'm in 7th grade and in a couple weeks I'm going to take an algebra test to see if I'm good enough to take Algebra at the High school in 8th grade. So my question is that does anyone know of some type of practice test or something that I could prepare with? Thanks.

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: Algebra

No, but here goes nothing:

Algebra Problem #JEF1

x = y  This is a diagonal line.  Have you learned this?  y = x  is more common than x = y.
 
x - 1 = y - 1  This is a diagonal line that goes through (1,1).  It is the same as y = x. 
Just add 1 to both sides:  x - 1 + 1 = y - 1 + 1    So,   x = y.

Last edited by John E. Franklin (2008-03-22 08:29:42)

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igloo myrtilles fourmis

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: Algebra

Problem #JEF2
inches = centimeters / 2.54
A 3/4 inch socket is almost the same as a 19 millimeter socket.
Try out the formula to see.
3/4 = 1.9 / 2.54  Is it close?
0.75 = 0.748031496  Hmm, not exactly, but the metric tool is a tiny bit smaller.

Last edited by John E. Franklin (2008-03-22 08:30:19)

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igloo myrtilles fourmis

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: Algebra

Problem #JEF3
"x" is how many feet one side of a square horse fence is.
"k" is how many blades of grass grow if you put a ruler flat and count the grass along it on one side.
How many blades of grass are in the square fenced-in area if the blades grow in a square grid pattern??
Multiply the number of blades of grass along one side of the East fence by the the blades of
grass along the North fence. 
Answer is "kx" along each side.
kx multiplied by kx is k up 2 times x up 2.
k²x²

Last edited by John E. Franklin (2008-03-22 08:41:53)

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igloo myrtilles fourmis

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: Algebra

Problem #JEF4
This one is easy.
x = 1
y = 2
z = 3
w = 4
What is xyzw ?
xyzw  means you multiply x by y by z by w.
So x times y times z times w is the answer.
(1)(2)(3)(4) =
2 times 3 is 6 and 6 times 4 is 24.
So xyzw = 24

Now what is wzxy ?
The answer is the same.
4 times 3 times 1 times 2 is still 24.
The order doesn't matter.

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igloo myrtilles fourmis

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: Algebra

Problem #JEF5
Three kids are measured standing backwards against a measuring poster.
Brian is 4 foot 7 inches = B.
Cecil is 4 foot 8 inches = C.
Ian is 4 foot 11 inches = I.
I - C = 3  and C - I = -3
I - B = 4 and B - I = -4
C - B = 1 and B - C = -1
(B + C + I)/3 = 4 foot 8.66667 inches

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igloo myrtilles fourmis

Nanukana

Guest

Re: Algebra

Thanks, I'll make sure I have all this down pat before the test, thanks again!