May SAT 2011: Math Section

Test Preparation SAT Preparation
281

<p>1) x was 5 more than 10. What is x? Answer: 5
2) 7k=k^2
3) 23 weeks
4) Diameter was 12
5) Numbers 3<em>5</em>11 (165)
6) Proportion of net income: 1 to 6
7) Point B
8) India
9) 1/ (n+1) (20th question in 20Q section)
10) 14 was the y coordinate of point P on a circle
11) The area was 18 (question #3)
12) stars: 24
13) 250
14) 0.3 % (17-b)
15) Which function cannot be f(something)=-5
16) the probability over 500: 18
17) total registered voters: 3500
18) the probability of choosing x and y from 1 to 10 numbers and placing in II quadrant is zero (none)
19) 9/5 is 9/5
20) 3.84 for the last gird-in
21) I, II, III for the last MC before gird-in
22) Two and One for choosing a 14 consequent numbers
23) if f(n)=n^2-n what is the value of f(-1)? 1+1=2
24) the degree measure of similar triangles x+y+z=240
25) 8.5 miles
26) y/x
27) number 7 in 18Q section: small triangle in big triangle (answer was C)
28) the right triangle is divided into three nonoverlapping angles: 2x; 3x; and 5x; What is x? 9
29) pen question: 4000
30) length of an arc: pi
31) 4<em>square root of 2
32) triangle x was 10 degrees
33) 8.105
34) A^3/2
35) 23 days
36) parallel lines: 72
37) reflection above line x (downward parabola; the same as –x^2)
38) 10-D 2</em>L*W/ L^2+W^2=3/4
39) mx+b. The product of mb is 0
40) 1.333
I got these answers from a friend can you guys help me match the answers to the questions?</p>

<p>START MATCHING !!!</p>

282

<p>shamoil it was A.</p>

283

<p>math this time around was hard. i left 2 blank and apparently got 2 wrong [stupid mistakes due to misreading the questions though] :(</p>

284

<p>did you guys get -8 for k on the one where there was “exactly one answer”?</p>

285

<p>so if math was hard for everyone, doesn’t that indicate a generous curve…? :D</p>

286

<p>what is 7) Point B, 16) the probability over 500:,11) The area was 18 (question #3)
12) stars: 24 25) 8.5 miles 36) parallel lines: 72 and 40) 1.333</p>

287

<p>and what is this -8 for k you’re talking about? i got 0 for x if that rings a bell.</p>

288

<p>nspired: 16 was saying if you have the numbers 3 6 7? and 8 and if you make a 3 digit number with it whats the likelihood it’s over 500? if you use probability you get up with the formula 3<em>3</em>2 = 18, or you can write it out manually and find 18 options.</p>

289

<p>for the n(1+n) question i put 1/n squared</p>

290

<p>@yoursky the stars questions was the one asking for the perimeter of the shaded region each side had 3 and there were 8 sides</p>

291

<p>ohhhhh i remember the stars question now, the answer is 24, solid on that</p>

292

<p>Nspired, nope. It was solving for k.</p>

<p>2x^2 + 4x + k (or something; the middle coefficient may be off)</p>

<p>with “exactly one answer for x”</p>

<p>options:
a. 2
b. 4
c. 8
d. -2
e. -8</p>

<p>or something hahah, i got -8.</p>

<p>ANYONE ELSE!?</p>

<p>basically you want, when you do the quadratic formula, to get the sqrt to be zero, right?</p>

293

<p>@Tizil 7. I could have sworn it was even integers. because i read questions like 5 times each lol.</p>

294

<p>what is this x=10 for some triangle problem?
i remember a problem like this:
…_
…/\x_
./…_ (staircase thing is supposed to be a line…)
./…_
/<strong>|</strong>___<em>y</em>&lt;/p>

<p>*dots are to fix formatting</p>

<p>y=40degrees
find x
the furthest left line is the same length as the left half of that bottom line
the angle at the top of the whole triangle is a right angle</p>

<p>my thinking:
40(y)+90+the remaining angle of the big triangle=180
remaining angle=50</p>

<p>for the small triangle, the congruent sides form an isosceles triangle meaning the 2 remaining angles of the small triangle are equal </p>

<p>so</p>

<p>180=50+2*remaining angle
so the remaining angles are 65 degrees each</p>

<p>so in the top of that triangle take the 90 degrees and subtract 65 and that equals 25 degrees?</p>

<p>this must be a different question cuz idk how x would equal 10? i also think this may have been experimental</p>

295

<p>i need to find out which ones the math experimentall… :(</p>

296

<p>liv4physicz, if the question was solve for k so that 2x^2 + 4x + k=0 has “exactly one root for x”, the answer should be k = 2 and x = -1 is the one root for the equation.</p>

297

<p>i still don’t remember this k=-8 thing (the entire question, actually). you guys didn’t happen to have the math experimentals, did you? otherwise i’m very unsure of my math score right now</p>

298

<p>The 1/n+1 question is -(1/n^2) - it asked for the SMALLEST number and the neg sign was clearly to the left so it is the opposite of 1/n^2</p>

299

<p>yeah k=-8… .mmmm i don’t remember it still.what number was it roughly?</p>

300

<p>what was the one like
2x^2+6x+16=x^2+6x+32
x^2-16=0
x=4 or something</p>