SAT math question.

Test Preparation SAT Preparation
1

<p>If 4(x+y)(x-y) = 40 and x-y=20, what is the value of x + y?</p>

2

<p>4(x+y)(x-y) = 40 and x-y=20</p>

<p>(x+y)(x-y) = 10 and x-y=20</p>

<p>(x+y)(20)=10</p>

<p>(x+y)=1/2</p>

3

<p>yup..........pretty much</p>

4

<p>plz......no more kindergarten math!</p>

5

<p>40/20 = 2
2/4 = 1/2</p>

<p>1/2 = answer...</p>

6

<p>I<em>Dont</em>know most of them are Americans :D</p>