Math help

Test Preparation SAT Preparation
1

<p>A four digit integer, WXYZ, in which each letter represents a difference digit is formed according to the following rules:</p>

<p>X = W + Y + Z
W = Y+1
Z = W -5</p>

<p>What is the four digit integer?</p>

<p>AND</p>

<p>A saleperson's commission is k percent of the selling price of a car. Which of the following represents the commission, in dollars, on 2 cars that sold for 14,000 each?</p>

<p>A) 280k
B) 7000k
C) 28000k
D) (14000)/(100+2K)
E) (28000+K)/(100)</p>

<p>AND</p>

<p>A cube has 2 faces paintedblack and the remaining faces painted white. The total area of the white faces is 64 sq inches. WHat is the volume of the cube in cubic inches?</p>

<p>A)64
B)125
C)128
D) 216
E) 256</p>

2

<p>Define W and Y in terms of Z
W = Z + 5
Y = Z + 4 (since W = Y +1)</p>

<p>X = W + Y + Z = 3Z + 9
Since X is less than 10, Z must equal 0</p>

<p>WXYZ is 5940</p>

3

<p>k percent = k/100
k/100 x 28,000 = 280k</p>

4

<p>area of 4 faces is 4s^2 = 64, implying s = 4, v = 64.</p>