How to do these 6 Math problems?

Test Preparation
1

<p>Remove the spaces between “im” and “gur” in order to see the questions</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/lb6jxGE.png
Answer: 18</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/GgHP6HR.png
Answer: B</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/KzWfHHT.png
Answers: A and E</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/mB7j0wt.png
Answer: B</p>

<p><a href=“http://i.im”>http://i.im</a> gur.com/TSdm7tP.png
Answer: B</p>

2

<p>1) see the bottom of <a href=“SAT Math Problems Thread - #91 by DrSteve - SAT Preparation - College Confidential Forums”>http://talk.collegeconfidential.com/sat-preparation/1639760-sat-math-problems-thread-p7.html&lt;/a&gt;&lt;/p&gt;

<p>2) The way the square is cut is dividing the side of length w into 2 parts and the side of length l into 4 parts (these side lengths will be equal because l=2w). So l/4 is the length of a side. B.</p>

<p>3) i) there is a text box blocking but… There are 20 people who live <3 miles away. Assuming the bar goes up to 40%, .4*20=8. A</p>

<p>ii) For people living between 12 and 15 miles, 80% have not eaten there. 80% of 15 is 12. For people living over 15 away 90% have not eaten, 90% of 10 is 9. 9+12=21. 21 out of 10+15 have not eaten. 21/25=84/100=84%. E.</p>

<p>4) The interior includes points (x,y) where -3<x<3 and -2<y<2. This leaves five choices for an x-value (-2 through 2) and three choices for a y-value (-1 though 1). 3*5=15. B</p>

<p>5) Multiply the bottom equation by 3 and set the two expressions for 3y equal to get 3-3cx=2x-6. (2+3c)x=9. This will have no solution only when 2+3c=0. c=-2/3, B</p>

3

<p>Thank you for the explanations ^</p>