Math question from Online test 1

Test Preparation SAT Preparation
1

<p>Can someone help me? thanks in advance.</p>

<p>Section 3
17) If the length of AB is 5 and the length of BC is 6 which of the following could be the length of AC? Know the answer but don't know why.</p>

<p>Section 9
9) The perimeter of an 80-ell is 326 and the perimeter of a 20-ell is 86. What is the perimeter of a 100-ell?</p>

<p>16) In the xy-coordinate plane, the graph of y=-xsquare +9 intersects line l at (p,5) and (t,-7).<br>
What is the least possible value of the slope of l?
a. 6
b. 2
c. -2
d. -6
e. -10</p>

<p>One more.</p>

<p>On the number line, the distance between the point whose coordinate is a and the point whose coordinate is b is greater than 100. Which of the following must be true?
I. a-b>100
II. la-bl >100
III. lal.lbl >100</p>

<p>a. II only
b. III only
c. I and II only
d. II and III only
e. I, II and III</p>

<p>thanxxxxx</p>

2

<ol>
<li>u didn't post the choices, so there could be alot of answers to this.
AC must be greater than 1 because the triangle thing,when u add the 2 sides, must be greater than the other one. so 7 8 9 10 are good choices</li>
</ol>

<p>Section 9
9) The perimeter of an 80-ell is 326 and the perimeter of a 20-ell is 86. What is the perimeter of a 100-ell?</p>

<p>this is a ratio problem kind of stuff.
80 ell 326
20 el 86
so 60 el increase leads to 240 +.
so 20 el increase leads to 80 +</p>

<p>80 el + 20 el = 326 + 80 ell = 406 </p>

<ol>
<li>im too lazy,but plug the 2 points, fig out X, then plot, connect, see which has the most negative slope.</li>
</ol>

<p>last one, if A and B are as shown
A________________B
2 --------------- 103</p>

<p>B__________<strong><em>A
500 -------------- 300
I X
II correct, distance always greater than 100
III i assume its l a l x l b l ,so what if:
A</em></strong>____B
1/2----------150
III is false.</p>

<p>choice A is correct</p>

3

<p>"AC has to be more than 11"
I think you meant that AC has to be less than 11. AC also has to be greater than 1.</p>

4

<p>oops yeah,that was a mistake,but i stated the possible choices so lol.</p>

5

<p>17) I'm confused. Is ABC a triangle or are they random points in a line?
9) ell-x= 4x6
16) -6, I think, (2,5) and (4,-7)?</p>

6

<p>doesn't matter, they can be on a number line too,but it will only show 1 value,because abc has to match the length</p>

<p>if u do it as sides of triangle, theres alot values.</p>