Math question from 2008-2009 sat practice test

Test Preparation SAT Preparation
1

<p><a href=“https://satonlinecourse.collegeboard…0087FB06-F.pdf%5B/url%5D”>https://satonlinecourse.collegeboard…0087FB06-F.pdf</a></p>

<p>this is the link for the test. It would have been pointless to type the questions down since the figures are significant.
Please tell me how to do 15#, 16# 18# </p>

<p>Thank you so much guys :)</p>

2

<p>The link doesn’t work for me.</p>

3

<p>here is the fixed link:</p>

<p><a href=“https://satonlinecourse.collegeboard.com/SR/digital_assets/assessment/pdf/0833A611-0A43-10C2-0148-CC8C0087FB06-F.pdf[/url]”>https://satonlinecourse.collegeboard.com/SR/digital_assets/assessment/pdf/0833A611-0A43-10C2-0148-CC8C0087FB06-F.pdf&lt;/a&gt;&lt;/p&gt;

4

<p>Which section?</p>

5

<p>^My question too :p.</p>

6

<p>I’ll assume it’s the Grid-In (18 question section).
For number 15, we already know that m1 x m2 = -1, if the two lines are perpendicular. So, with that information in mind, we figure out the slope of line 1, denoted as m1. The points we’re going to use are (-2,0) and (0,-3), since the lines cuts the x-axis at -2, and the y-axis at -3. Therefore, m1 = -3-0 / 0–2 = -3 / 2 = - 3/2. Now let’s substitute m1 into our original equation to find the value of m2.

  • 3/2 x m2 = -1. Therefore, m2 = 2/3. </p>

<ol>
<li><p>Simply substitute a negative value for x, to produce a number that is between 6 and 7. It can be any value between -3 and -4. Let’s take -3.5, therefore, a possible value of modulus x will be 3.5</p></li>
<li><p>Before I elaborate further, I need to double check my answer with you. Is the answer 23.33?</p></li>
</ol>

7

<p>yea, you’re right </p>

<p>18:</p>

<p>if the area of the triangle is 7, then what the previous multiplication result (from the area of triangle formula) is obviously 14. Now we just have to find 2 numbers that times each other are = to 14 with the rule ‘PT = 2/5 of PS’ also being followed.</p>

<p>you can turn 2/5 into 4/10 or 6/15, I chose 6/15. If PT = 6/15, then TS = 9/15, or you can just make TS = 9 and PT = 6.</p>

<p>If TS = 9, just do 14/9 to find RS. You get 1.55555(repeating). Now just add 9 and 6 for the bottom side and times that by 1.5(repeating) and you get the answer that sirwanksalot got.</p>

8

<p>sorry guys i meant section 6 but thank you for the other ones too</p>