Posted by **Leslie** on Sunday, September 26, 2010 at 1:08pm.

1.The square of x is equal to 4 times the square od y. If x is 1 more than twice y, what is the value of x?

A) -4

B) -.5

C) -.25

D) .25

E) .5

2.In the xy-coordinate plane, lines L an Q are perpendicular. If line L contains the points (0,0) and (2,1), and line Q contains the points ( 2,1) AND (0,T) What is the value of T?

A)-3

B)-2

C)2

D)3

E)5

3. For all positivw integers x, let xÄ

be defined to be (x-1)(x+1). Which of the following is equal to 6Ä-5Ä?

A)2Ä= 1Ä

B)3Ä= 2Ä

C)4Ä= 3Ä

D)5Ä= 4Ä

E)6Ä= 5Ä

- Math -
**bobpursley**, Sunday, September 26, 2010 at 1:19pm
Do you have any thinking on these? Surely you do not want us to give you answers.

- Math -
**Leslie**, Sunday, September 26, 2010 at 1:28pm
1. X^2= 4Y^2 and x=2y+1

Sooo i substitute

(2y+1)^2= 4y^2

Find the square root of both sides

2y+1= 4y

Solve for y

2y+1=4y

1=4y

.25=y

Substitue into X=2y=1

x=2(.25)+1

x=.5+1

x=1.5

But that's not an option.What did i do wrong?

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