Math question Help

<p>I have forgotten how to do this. I recall the formula, but we went over it a week before the final so I was not paying 100% attention to learning it as I was to getting all the information I accumulated back and ready for the exams. something like </p>

<p>N(term)=N+1(something) and there are different ways to manipulate the formula, but I am guessing you only need basic sequence knowledge for the SAT. I am only concerned with getting a better SAT score right now. </p>

<p>In a certain sequence where the numbers are increasing, the difference between consecutive terms is always the same. If the fourth term in the sequence is 19 and the eleventh term is 47, what is the first term in the sequence?</p>

<pre><code>(A) 1
(B) 3
(C) 7
(D) 8
(E) 11
</code></pre>

<p>won't give away answer so you guys have some fun without spoiling it</p>

<p>If a not equal to 0 and 5 over x = (5 + a) over (x + a), what is the value of x?</p>

<pre><code>(A) negative 5
(B) negative 1
(C) 1
(D) 2
(E) 5
</code></pre>

<p>another one for you…answer for first one later though :)</p>

<p>do you want the answers ??? there pretty easy :D</p>

<p>Figure
Note: Figure not drawn to scale.</p>

<p>The figure above shows a right circular cylindrical wheel of cheese 2 inches high from which a wedge weighing 1 over 2 pound has been cut. All cuts are perpendicular to the base and radiate from points B and C, the centers of the circular top and bottom. What is the weight, in pounds, of the original uncut wheel?</p>

<pre><code>(A) 2
(B) 3
(C) 4
(D) 6
(E) 12
</code></pre>

<p>I’m sure some where there are these exact same questions… I am doing an online skills insight on the collegeboard website.</p>

<p>but still</p>

<p>I do not understand this one either…guess i’m really rusty after the summer</p>

<p>the cut would be 30 degrees according to the figure not shown… 30 out of 360 or 12% of the whole thing. But using 12% did not get the right answer for me so I am stuck</p>

<p>yea i would like the answers, and an explanation…the only thing these questions do not have is an explanation…</p>

<p>by the way, if you want to make fun of how easy they are. maybe you should use the right words to say so. They are or they’re not ‘there’</p>

<p>In the coordinate plane, the points F (negative 2 comma 1), G (1 comma 4), and H (4 comma 1) lie on a circle with center P. What are the coordinates of point P?</p>

<pre><code>(A) (0 comma 0)
(B) (1 comma 1)
(C) (1 comma 2)
(D) (1 comma negative 2)
(E) (2.5 comma 2.5)
</code></pre>

<p>these have plagued me quite frequently… If anybody has a quick answer to this, It would be much appreciated. In honors algebra 2 we went over this extensively but I have forgotten the formula. Besides, there has to be a quick way to answer these sort of problems at least one will be on the sat itself</p>

<p>well i am not making fun i am really sorry if you misinterpreted me , my grammar skills are really rusty(always been) but i guess the first question is 7… Is that the answer ???</p>

<p>Guess 2nd one is 5… Is this correct ???</p>

<p>I thought you said you knew how to do them? oh well, yea I guess we both should relax a little</p>

<p>these are from the Skills Insight on the sat website, but without answer explanations to them</p>

<p>anybody with explanations is welcome to help out. Usually these type of questions tend to get answered quickly. </p>

<p>the first one is 7 and the other is 5 but how? I have seen some great explanations on this site and they always make other questions even easier. Help would be much appreciated</p>

<p>well I took the fouth term 19 and eleventh term 47 then i made an equation 19+7x=47 I chose 7 because it is the difference between 4th and eleventh term (places) x=4 then I subtracted 19-12 as difference between 4th and 1th term is 3 places = 7</p>

<p>(5/x)=(5+a)/(a+x) I multiplied 5 by a+x and x by 5+a,… 5a+5x=5x+ax 5x cancels out 5a=ax (a/a =1) 5=x</p>

<p>3rd cant help you need to see diagram… Im really bad at imagining diagrams</p>

<p>4th is B … Is this correct ??? Aint really sure working on another way to find the solution.</p>

<p>Thanks man, sorry for how the questions looked. I have trouble with screenshots, so I just C&P but it ends up changing what I write to a bit more confusing language. </p>

<p>I think the 4th on is B.</p>

<p>no prb happens to me all the time(grammar idiot) do you want my reasoning on why 4th is B or do you have a good one???</p>

<p>here is another one that I found</p>

<p>The circumference, in inches, of a certain circle is C, where Absolute value (C minus 20.5) less than or equal to 0.5. Which of the following is a possible area of the circle, in square inches?</p>

<pre><code>(A) 64 over pi
(B) 81 over pi
(C) 100 over pi
(D) 121 over pi
(E) 144 over pi
</code></pre>

<p>I did it this way, I figured that c= any number 20.5-21
c=2 pi R, so i divided by 2 pi the lowest and highest number to get a range of acceptable numbers</p>

<p>but I’m still sort of confused though, the correct answer is C 100/pi</p>

<p>guess i just needed to rethink it or something…i did not understand if what i did was right.</p>

<p>yea a refresher on how to do 4th one would be appreciated.</p>

<p>1)Well youre logic is 1000000% correct thats what I did also and its the simplest one I found</p>

<p>2)About the 4th question and B as its answer here is the explanation:
F(-2,1),G(1,4),H(4,1) as you noticed that the distance from G to F is equal to that from G to H( 3 units from each point on X axis) which means that FH is a diameter now we have the X cordinate which is 3 from F to right or 3 from H to left which is 1, now for Y coordinate as FH is diameter in center of circle the coordinate is also 1…
Are you convinced ?
I am trying to find an equation IF I find it I will tell you.
Btw I requested you as a friend :D:D:D</p>

<p>[Improve</a> Your SAT Scores with the SAT Skills Insight](<a href=“The SAT – SAT Suite | College Board”>The SAT – SAT Suite | College Board)</p>

<p>number 3 on this page has got me in some trouble…I have been working all the way through, so far the 700-800 range has only had 2 questions wrong</p>

<p>number 5 as well i got wrong… I put 28 at first but that is clearly wrong when I looked it over again… any help with figuring this out?</p>

<p>already worked through the reading</p>

<p>Number 3 is B
Number 5 is 196
I must admit they are difficult</p>

<p>Explanation for number 3:How to find H, if you observe the point pattern carefully you will see that it looks like a triangle, if you took half of the triangle (Point A ,the one to its right, the one above it, Point C you will see that they form a right angled triangle) radius=4 thus the hypotenuse(longest side)=8 and the distance from A to the point next to it is(on right) 4thus the length of side with Point A and the one above it is 4squareroot3(pythagoreous theorem) now to find H you must add 4squareroot3 and the distance from m to A =4 and the distance from line L to the closest point which is also 4 thus 4+4+4squareroot3=8+4squareroot3 thus B is the answer.
Explanation for number 5:Well lets say that (n) is square of (i) which is the positive integer, so n is divisible by both 7 and 14 thus it is a multiple of 7 which multiple of 7 is divisible by both 7 and 14 very obviously 14 so 14 is the positive integer now just square it and you will get 196 which is the answer. You might ask this question why 14 is not n then, the answer is that n is a sqaure of positive integer WHILE 14 is not a square(impossible to square root it and get and integer)
Are you convinced…? Please tell me.</p>

<p>[Improve</a> Your SAT Scores with the SAT Skills Insight](<a href=“The SAT – SAT Suite | College Board”>The SAT – SAT Suite | College Board)</p>

<p>Number 1 is hard, and I am probably missing some sort of geometric rule that is keeping from having one clue as to the answer</p>