AMC 12B questions

<p>does anyone remember what questions 8,9 and 18 were about??</p>

<p>8 was about a line passing through a parabola.</p>

<p>9 was about the difference between the mean and median test score for a class.</p>

<p>18 was about where you could form an acute triangle in the first quadrant, given one side.</p>

<p>8 was a funny one. i hated #11, it stopped me from going to AIME</p>

<p>writen AMC 11 in 10th grade, and only got 80 something :frowning:
but anyway, from what you ppl are saying! these questions are easy! line and parabola? median and means? and the quadrant triangle is #18, it sounds like a piece of cake!</p>

<p>20: 20, 10, 10, 5, 5, 1, 1
20:10, 10, 5, 5, 1, 1<br>
10: 10 </p>

<p>–14 20+ combinations</p>

<p>10-5, 5, 1, 1
10-5, 5, 1, 1<br>
5-5, 1, 1<br>
5-1, 1<br>
1-1 </p>

<p>–14 non-20+ combinations</p>

<p>1/2 are 20+</p>

<p>Okay, Newby:</p>

<p>18) Let A(2,2) and B(7,7) be points in the plane. R is the region in the first quadrant where you can place a point C, making an acute triangle ABC. What is the closest integer to the area of R?
(A) 25 (B) 39 (C) 51 (D) 60 (E) 80</p>

<p>No, it’s not that hard. Though questions 22, 24, and 25 were.</p>

<p>cmon jared, i thought 18 was hard :slight_smile: I got 132.5, but I skipped that one.</p>

<p>[You recognize me from AoPS, right?] Actually, I missed that problem during the test. I had the right method, and all, but I was sick and didn’t realize that it was an ellipse in the shape of a circle. Not knowing how to find the area of it, I just used a square…got 65 intead of 50.73.</p>

<p>I did horribly on this AMC. 80-something.(I will keep blaming that on being sick) But I got 101 on the A, so it’s AIME time!!</p>

<p>Isn’t it interesting how easy both #23’s were this year?</p>

<p>thanks for explaining #8. i suck at life. one question off AIME.</p>

<p>Ew you guys, why would you want to take the aime? Who wants to take a 15 question math test for 3 hours. Not my idea of a good time.</p>

<p>8 wasn’t so bad (I thought it was a trick question, LOL), 9 was extremely easy, 11 was funny (we all thought our answers were wrong so we all panicked until someone calmed down and figured that our answers were indeed right).</p>

<p>I thought 20 and 15 was very very easy for some reason. I was shocked at number 20 because I think it seemed more like a number 8 or 9 question.</p>

<p>waitt #8 was the one with y = x^2 + a^2 or something?? i thought that was number 4. if not, then what was number 4?? also, q.7 was the one about the area above the x-axis for that eq. with the abs. i got 24 the first time i did it, but the second time i checked it i thought i forgot to multiply by .5 since it was a triangle with b = 8 and h=3…lemme know if i messed up one of those values or smthing</p>

<p>it wasnt the area above the x-axis, it was the area enclosed by the graphs of the equations. the answer was 24.</p>

<h1>15 WAS easy. i was pretty shocked when i saw it. i was like “*** is this problem doing over here?”</h1>

<p>i got # 8 wrong because i skipped over the word vertex, which made a pretty big difference. and for #15 i guessed and checked and got it wrong because i had two digits which were the same. i didnt check over that i guess.</p>

<p>AND I KNEW #18, BUT I WAS AFRAID I WAS WRONG SO I DIDNT ANSWER IT…GRRRR</p>