<p>there are four notes... so he plays them the complete group any number of times + 3 notes (upto the shaded one)</p>
<p>in #11 ...the total capacity in gallons is 2.. and the number of liters she buys = d/1.25</p>
<p>to Junior Member</p>
<p>thx!so for function questions..all i have to do is to subsitute numbers to get the value right???</p>
<p>and for #10..f(x)=kg(x)+2
f(t)=30 and g(t)=8
f(x)=f(t), g(t)=g(x)??</p>
<p>arrr im really sux in math..what can i do guys???
some questions arent hard at all..but i jzt cant figure out..!!
so jzt keep doing math questions???any good book recomm?</p>
<h1>11,so m doesnt really bother right?</h1>
<p>damn..i jzt realized #12 is so easy..!!</p>
<p>nonono the answer to the first question is 5/9</p>
<ol>
<li>If J is chosen at random from the set {4,5,6} and k is chosen at random from the se {10.11.12}, what is the probability that the product of j and k is divisible by 5?</li>
</ol>
<p>Total combinations possible = 3*3 = 9
Favorable combinations = 3 with (5) and 3 with (10) - (the common one of 5 and 10)
= 3 + 2 = 5
So probability = 5/9</p>
<p>14.how many positive four-digit integers have 1 as their first digit and 2or5 as their last digit?</p>
<ol>
<li>if v/s=2 and r/s=t/v, where t is not equal to 0,which of the following must be equal to r/t?A)1/2 B)2 C)t/v D)v/2s E)2v/s</li>
</ol>
<p>16.the total cost of a taxicab ride is the sum of 1)a basic fixed charge for using the taxicab,and 2)an additional charge for each 1/4 of a mile that is traveled.
if the total cost to ride3/4 mile is $4.00 and the total cost to ride 3/2miles is $5.5.what is the total cost in dollars, of a 3mile ride?</p>
<ol>
<li>RYGWBRYG YGWB
the figure above shows the remaining pieces of a paper chain from which a section has been removed. the first link of the original chain was red and the colors of the links formed the repeating pattern of RYGWB left to right. which of the following could be the number of links in the section that was removed?
A)60
B)61
C)62
D)63
E)64</li>
</ol>
<p>18.ABCDEFG
a list consists of all posiible three-letter arrangements formed by using the letters above such that the first leter is D and one of the remaining letter is A. if no letter is used more than once in an arrangement in the list and one three-letter arrangement is randomly selected form the list, what is the probability that the arrangement selected will be DCA?</p>
<p>19.for all x>and equal to -1, let the function f be defined as f(x)=square root of x-1. which of the following is equal to f(15)-f(8)?
A)f(-1)
B)f(0)
C)f(1)
D)f(7)
E)f(square root of 7)</p>
<ol>
<li><p>The four digit number is written as 1 _ _ (2 or 5)
so hundred's place in 10 ways (0 - 9), ten's place too.. and unit's place in 2 ways
= 10<em>10</em>2 = 200 such numbers</p></li>
<li><p>r/s=t/v ---> r/t = s/v
and given that v/s = 2, so s/v = 1/2 ------> the answer</p></li>
<li><p>Let B be the basic charge, and C be the charge for each 1/4 mile traveled.
$4 = B + 3(C)
$5.5 = B + 6 (C)
Solve these two to get B and C and plug in for a 3 mile ride.. 3 miles = 12 times (1/4)</p></li>
<li><p>the basic link that could be missing is 'WBR' ... Additional links must be removed
The next bigger one could be 'WBR''YGWBR' .... so any additional links removed must be in groups of 5.
So the number must be of the form 5K + 3
so the answer is 63 .....( 5(12) + 3 )</p></li>
<li><p>The sequence will be of the form D _ _ where one of the blanks is A and the other one is any letter except A and D.
Total arrangements = 5 x 2 = 10 .....(5 for remaining letters, and 2 for 2 positions of A)
Prob. of getting DCA = 1/ 10</p></li>
</ol>
<ol>
<li>Seems to be an error in the question.. for x > = -1 .. sqrt(x-1) won't be defined for -1 and 0 (for example) , unless you're including complex numbers within the scope of this question.</li>
</ol>
<p>Anyway, I think the function is actually f(x) = sqrt(x+1)
f(15) - f(8) = sqrt(16) - sqrt(9) = 1
which is equal to f(0) since f(0) = sqrt(1) = 1</p>
<p>To spideyunlimited</p>
<p>i really dun get #18..Im so confuse on probability..what concept should i reveiw for probability?? </p>
<p>and i think the answer for #19 is correct. since f(0)=sqrt(1)=1</p>
<ol>
<li>in the xy-coordinate plane ,the graph of y=-x^2+9intersects line L at (p,5) and (t,-7). what is the least possible value of the slope of L?
A)6
B)2
C)-2
D)-6
E)-10</li>
</ol>
<p>Find p and t separately by using the equation y = -x^2 + 9.
Then find the least value of the slope [(-7 - 5) / (t-p)]</p>
<p>5 = -p^2 + 9
p = +-2</p>
<p>-7 = -t^2 + 9
t = +- 4</p>
<p>Slope = -12 / t-p
for the least value, t-p must be the smallest positive value possible. viz. +4 -2 = 2
So slope = -6</p>
<ol>
<li>
A _(space) X B X+Y C (X+Y)/2 _ D _ E
on the number line above, the tick marks are equally spaced. which of the lettered poings represents y?
A)A
B)B
C)C
D)D
E)E</li>
</ol>
<p>to spideyunlimited
what score did u get on Math??
the highest i got is 680..cant improve anymore.what shold i do? just keep practicing math problems?</p>
<p>For probability, hmm just practice interesting questions, you have to think clearly for it.
I got 800... Practice a variety of questions and concepts.</p>
<p>21... umm which one are the tick marks? and are x, x+y and (x+y)/2 the distances between the ticks or the consecutive letters?</p>
<p>A, X, B, X+Y ,C ,(X+Y)/2, D and E are the tick marks
the space means there is no indicate number/letter..</p>
<p>interesting questions??which books did u practice?PR,BB,Grubers or other?
some questions are so easy basically,but i just couldnt figure out..sigh!!</p>
<p>continue....</p>
<p>22.in an art class, there were just enough staplers, rulers, and glue bottles so that every 2 students had to share a staper, every 3 students had to share a ruler, and every 4 students had to share a glue bottle. if the sum of the number of staplers, rulers, and glue bottles used by the class was 65, how many students were in the class?
--so for these kinda of questions,all i have to do is set the chart right??</p>
<p>23.for all values of y, let y@ be defined by y@=y^2-1.which of the following is equal to (y@)@?
A)y^4 -1
B)y^4 - y^2 - 1
C)y^4 + y^2 - 1
D)y^4 - 2y^2
E)y^4 - 2y^2 + 1</p>
<p>24.if three different circles are drawn on a piece of paper,at most how many points can be common to all three?
A)0
B)1
C)2
D)3
E)6</p>
<p>25.A club is buying boxes of candy bars to sell for a fundraiser. if each box contains c candy bars, and each member sells x bars each day, how many boxes are needed to supply enough candy bars for 3c members to sell for 5 days?
A)(15c^2)x
B)x/15
C)3x/5
D)(15c^2)/x
E)15x</p>
<p>26.for which of the following functions is it true that f(-2)=f(2)?-->(easy one but i forgot how to do it)
A)f(x)=3/x
B)f(x)=2-x
C)f(x)=x+1
D)f(x)=x^2+1
E)f(x)=2x^3</p>
<ol>
<li>six points are placed on a circle. what is the greatest number of different lines that can be drawn so that each line passes through two of these points?
A)12
B)15
C)25
D)30
E)36
--->for this question,what do you usually do?draw it??</li>
</ol>
<p>28.three lines are drawn in a plane so that there are exactly three different intersection points. into how many nonoverlapping regions do these lines divide the plane?</p>
<p>thx again to spideyunlimited..=]</p>
<p>22) Let number of staplers, rulers , glue bottles = a,b,c respectively.</p>
<p>2a = 3b = 4c
a + b + c = 65
now substitute everything in terms of one variable
2c + 4c/3 + c = 65
solve to get the answer.</p>
<p>23) y@=y^2-1
(y@)@ = (y^2 - 1)^2 - 1
= y^4 + 1 - 2y^2 - 1
= y^4 - 2y^2</p>
<p>24) 2 points.. first draw 2 intersecting circles, and the 3rd one passes through both their intersections... </p>
<p>25) A club is buying boxes of candy bars to sell for a fundraiser. if each box contains c candy bars, and each member sells x bars each day, how many boxes are needed to supply enough candy bars for 3c members to sell for 5 days?</p>
<p>1 member sells x bars on each day. Number of boxes he requires each day= x/c
For 5 days, he requires 5x/c boxes
and for 3c such people , boxes required are 3c*5x/c = 15x</p>
<p>26) this is true for even functions ... here, the even powered function
f(x) = x^2 + 1 </p>
<p>27) 6C2 ... u have 6 points and u can choose any 2 to make a line.
6C2 = 6*5 /2 = 15</p>
<p>remember in 22, once u get the value of either a or b or c, then the number of students = 2a = 3b = 4c</p>
<p>Actually i just practiced the test format from Barron's .. The course rigor is quite tough here in my country lol</p>
<p>i need a clear figure for that ticks and marks one... #21 ,,, just upload an image on some site and link it here</p>
<p>Barron's really helps alot???im doing the old SATs..hope it will help too</p>
<p>10 days left.........sigh</p>
<p>i will upload the image tomorrow..so tired now.time to sleep</p>