math questions part 2 !

Test Preparation SAT Preparation
1

<p>1) <a href="http://i51.tinypic.com/2enqmn5.jpg%5B/url%5D"&gt;http://i51.tinypic.com/2enqmn5.jpg&lt;/a&gt;&lt;/p>

<p>2) <a href="http://i55.tinypic.com/9ub2oi.jpg%5B/url%5D"&gt;http://i55.tinypic.com/9ub2oi.jpg&lt;/a&gt;&lt;/p>

<p>3) <a href="http://i52.tinypic.com/213kj08.jpg%5B/url%5D"&gt;http://i52.tinypic.com/213kj08.jpg&lt;/a&gt;&lt;/p>

<p>4) <a href="http://i54.tinypic.com/14118xh.jpg%5B/url%5D"&gt;http://i54.tinypic.com/14118xh.jpg&lt;/a&gt;&lt;/p>

<p>5) <a href="http://i54.tinypic.com/2cyjuzd.jpg%5B/url%5D"&gt;http://i54.tinypic.com/2cyjuzd.jpg&lt;/a&gt;&lt;/p>

<p>6) <a href="http://i56.tinypic.com/33xk8id.jpg%5B/url%5D"&gt;http://i56.tinypic.com/33xk8id.jpg&lt;/a&gt;&lt;/p>

<p>7) <a href="http://i56.tinypic.com/2rnv9dv.jpg%5B/url%5D"&gt;http://i56.tinypic.com/2rnv9dv.jpg&lt;/a>
need them before the test !!</p>

2

<p>The second one goes something like this:

<a href=“http://tapatalk.com/mu/dcff0224-c47f-ba7c.jpg[/IMG]”>http://tapatalk.com/mu/dcff0224-c47f-ba7c.jpg

</a></p>

3

<p>Question 4:

<a href=“http://tapatalk.com/mu/dcff023d-c639-bb21.jpg[/IMG]”>http://tapatalk.com/mu/dcff023d-c639-bb21.jpg

</a></p>

4

<p>Question 6:

<a href=“http://tapatalk.com/mu/dcff021f-c707-18ff.jpg[/IMG]”>http://tapatalk.com/mu/dcff021f-c707-18ff.jpg

</a></p>

<p>By the way, are these SAT I Math or Subject test questions? ^^</p>

5

<p>Question 5:

<a href=“http://tapatalk.com/mu/dcff025a-c8b1-3a98.jpg[/IMG]”>http://tapatalk.com/mu/dcff025a-c8b1-3a98.jpg

</a></p>

6

<p>Question 7:

<a href=“http://tapatalk.com/mu/dcff0251-ca15-478d.jpg[/IMG]”>http://tapatalk.com/mu/dcff0251-ca15-478d.jpg

</a></p>

7

<p>Question 3:

<a href=“http://tapatalk.com/mu/dcff0251-cc10-7741.jpg[/IMG]”>http://tapatalk.com/mu/dcff0251-cc10-7741.jpg

</a></p>

8

<p>Okay i’m not too sure about question 1, but here’s how I did it:

<a href=“http://tapatalk.com/mu/dcff0253-cd16-f242.jpg[/IMG]”>http://tapatalk.com/mu/dcff0253-cd16-f242.jpg

</a></p>

9

<p>Whoo didn’t realize I’d finished them all:) hope that helps and thanks for posting! (haha procrastinator here, better get along to studying for my own SAT!)</p>

10

<p>@ivoryis thx man for ur time to help me :slight_smile: but can u explain more #5 ?</p>

11

<p>5)</p>

<p>distance = rate * time</p>

<p>d | 45 | d/45
d | 30 | d/30</p>

<hr>

<ul>
<li>| - | 1</li>
</ul>

<p>Note: In the above chart the first column is distance (unknown), the second column is rate, and the third column is time which I computed using d=rt, or equivalently t = d/r.</p>

<p>Since the two times add to 1, we have:</p>

<p>d/45 + d/30 = 1</p>

<p>We need to solve for d. I’m going to start by multiplying both sides of the equation by (30)(45)</p>

<p>30d + 45d = (30)(45)</p>

<p>75d = 1350
d = 1350/75 = 18</p>

<p>Remark:I multiplied by the product (30)(45) to clear the denominator. I could have multiplied by the lcd to keep the numbers smaller, but that would require more thinking, and you can use a calculator anyway.</p>