Help with math questions!

Test Preparation SAT Preparation
1

<p>I got these questions wrong on the practice test #1 in the BB, but I cannot figure out why:</p>

<ol>
<li>If 3a + 4b = b, which of the following must equal 6a+6b?
a. 0
b. 12
c. 2b
d. 12b
e. 6b - 8</li>
</ol>

<h1>20 on the same section. It's BB Practice test #1, it has to do with salesperson's commission...</h1>

<h1>8 in section 7...deals with votes casted for different candidates.</h1>

<h1>16/#18 on the grid in questions.</h1>

2

<p>16.)
3a=-3b
This means that a=1 and b=-1.
Input these values into the second equation.
6(1) + 6(-1)= 6 - 6= 0</p>

3

<p>k percent= k/100
14000 x 2= 28000
Commission= k/100 x 28000= 280k
(A)</p>

4

<p>8.)</p>

<p>x + (x+28000)= 2,800,000
2x + 28000= 2,800,000
x= 1,386,000</p>

<p>Candidate 1’s percentage of votes cast= (1,386,000+28000/2,800,000)x100= 50.5%</p>

5

<p>What about the grid ins?</p>