ACT April 10, 2010 Official Math Thread

<p>Consolidated List</p>

<p>5 teachers only taught math
96 was SA of the cube
800 for the one on 0.5
D was greatest out of a,b,c,d,e
100 was the boxes/area in 11 horizontal/vertical lines
62.5 for the geometric sequence
sides of parallelogram were 14,24,24
11 buildings had 6,7,8 rooms
3x=21
10cos75
-7/9= cos2x
the graph on lemonade started at -5 and touched the x-axis when x=10
7 4-pack tomatoes
25 putunias
central angle in shaded sector of circle was 45 degrees
a * c^2 > 0
18x-17
absolute value= -x+2
(0,-c) is the rotation of the parallelogram
35 degrees between one side of parallelogram and y-axis
4 was answer to the one on the roads (the 5,12,13 triangle) with elm street
Point y on the parallelogram was (a+c, b)
for f(g(x)), b= -4
the girl needs to read 3/20 of the book
cos2x= -7/9
blue flags= 24
the diagonal of squares increase by sqrt. 2 * L
4-pi for the one circle in the square
quadratic= 5+/- sqrt ( 25-4(3)(1)) all over 2(1)
in the triangle with a and c congruent, each angle measures 33 degrees</p>

<p>Consolidated List</p>

<p>31/60</p>

<p>5 teachers only taught math
96 was SA of the cube
800 for the one on 0.5
D was greatest out of a,b,c,d,e
100 was the boxes/area in 11 horizontal/vertical lines
62.5 for the geometric sequence
sides of parallelogram were 14,24,24
11 buildings had 6,7,8 rooms
3x=21
10cos75
-7/11= cos2x
18x-15
the graph on lemonade started at -5 and touched the x-axis when x=10
7 4-pack tomatoes
25 putunias
central angle in shaded sector of circle was 45 degrees
a * c^2 > 0
18x-17
absolute value= -x+2
(0,-c) is the rotation of the parallelogram
35 degrees between one side of parallelogram and y-axis
4 was answer to the one on the roads (the 5,12,13 triangle) with elm street
Point y on the parallelogram was (a+c, b)
for f(g(x)), b= -4
the girl needs to read 3/20 of the book
cos2x= -7/9
blue flags= 24
the diagonal of squares increase by sqrt. L * 2
4-pi for the one circle in the square
quadratic= 5+/- sqrt ( 25-4(3)(1)) all over 2(1)
in the triangle with a and c congruent, each angle measures 33 degrees
Reading question where he read 1/12 for 3 days. A:3/20 for 5 days.</p>

<p>I like how there’s 18x-15 and 18x-17. I’m pretty sure it’s 17 because I remember there being an 8 and a 9</p>

<p>Oh sorry my bad, it’s 18sin47/ sin76. NOT 18sin76. I’m just basing this on what you wrote 'cause i don’t remember the question exactly.</p>

<p>^ i already mentioned the reading question,
“the girl needs to read 3/20 of the book”</p>

<p>i’m pretty sure it comes out to 18sin76/sin47</p>

<p>because side AC = b
so sin47/18 = sin76/b
so 18sin76= bsin47
divide by sin 47
so 18sin76/sin47???</p>

<p>Umm I’m pretty sure the diagolals of the square increased by the square of 2 times L because it was a 45,45, 90 trainle and it was asking for hypotonuse which is Lradical2</p>

<p>i know those answer choices for the laws of sine are accurate since they were on my calc…now its time for you guys to figure it out :)!</p>

<p>Yah, I also put 2xL</p>

<p>yeah i said that before, they just didn’t correct it.</p>

<p>sorry guys,
its just that i corrected, but then i copied and pasted so it messed up
i think the list is fine now?</p>

<p>i guess it would make sense because 18sin76/sin47 is like 23.88…and the angle corresponding with that is angle b which is 76…and 18 corresponds with angle a which is 47 so it would make sense that it would be bigger than 18…and also none of the other ones get you over 18…so i guess it is 18sin76/sin47.</p>

<p>For the Elm Street one, was 5 an answer choice i think i may have made a careless calculation error and put 5 if that was a choice</p>

<p>And I’m still confused, is the L one sqrt 2<em>L or just 2</em>L</p>

<p>31/60</p>

<p>5 teachers only taught math
96 was SA of the cube
800 for the one on 0.5
D was greatest out of a,b,c,d,e
100 was the boxes/area in 11 horizontal/vertical lines
62.5 for the geometric sequence
sides of parallelogram were 14,24,24
11 buildings had 6,7,8 rooms
3x=21
10cos75
-7/9= cos2x
the graph on lemonade started at -5 and touched the x-axis when x=10
7 4-pack tomatoes
25 putunias
central angle in shaded sector of circle was 45 degrees
a * c^2 > 0
18x-17
absolute value= -x+2
(0,-c) is the rotation of the parallelogram
35 degrees between one side of parallelogram and y-axis
4 was answer to the one on the roads (the 5,12,13 triangle) with elm street
Point y on the parallelogram was (a+c, b)
for f(g(x)), b= -4
the girl needs to read 3/20 of the book
cos2x= -7/9
blue flags= 24
the diagonal of squares increase by sqrt.2*L
4-pi for the one circle in the square
quadratic= 5+/- sqrt ( 25-4(3)(1)) all over 2(1)
in the triangle with a and c congruent, each angle measures 33 degrees
18sin76/sin47</p>

<p>@ elau, fix the following errors in the list
18x-15- OMIT it
cos2x= -7/9 not -7/11
diagonal of squares increase by sqrt 2 * L not sqrt L *2</p>

<p>the diagonal of the square didnt increase by sqrt L x 2 it was sqrt 2 x L
EDIT: nvm wazza said it right</p>

<p>Ahh the 1/12 book one got my I kept thinking that she read 1/12 of the book total in 3 days so I kept dividing 11/12 by 5 and couldn’t find an answer. That was unclear to me that each day she read 1/12, not 1/12 total in the 3 days</p>

<p>what would i get for a -4 on the math section…about what?</p>

<p>the function question with f(g(x))</p>

<p>@ galib the one on (f(g(x))
f(x) was sqrt x
g(x) was 10x+b
and the line went throuh points (4,6), you needed to find B</p>