<p>first one is B, right?</p>
<p>well yah u r right but i have all of their answers i just want to know the way u of answering them properly and easily!</p>
<p>ok average = total/count</p>
<p>4 bags of flour average 15 translates to total/4=15
total weight= 15*4= 60
the average weight of all eight bags = 60(total weight of 4 bags) +20(total weight of the other 5-pound bags)/8(total number of bags) = 10</p>
<p>to sum up what I said</p>
<p>x/4=15
15*4=60
60+20/8= 10</p>
<p>if number 3 is C then i could provide an explanation</p>
<p>Can you post the answers to these? Two of them stumped me.</p>
<p>For 2</p>
<p>Note that AB, BE, AE, ED and EC are all radii of one or the other circle. So each is 4.</p>
<p>Note that triangles ABE and CED and equilateral (all sides are of length 4).</p>
<p>Note that BE is parallel to CD (or alternatively that BEC is equilateral). Either way you think about it BC = ED = 4.</p>
<p>So AB + BC + CD + DE + EA = 4 + 4 + 4 + 4 + 4 = 20</p>
<p>number 4 is very easy, you just have to know how to deal with angles.</p>
<p>a+90+b=180
a+b=90
b+90+c=180
b+c=90
c+90+k=180
c+k=90</p>
<p>b+c=c+k
b=k</p>
<p>For 3</p>
<p>The area of the triangle ABO is 1/2 base x height. Use the properties of the 30.60.90 degree triangle to figure out the base. One way is: tan 60 = base/height. Tan 60 is sqrt (3). So the area of the triangle is 1/2 * 6 * 6 * sqrt (3) or 18 * sqrt (3).</p>
<p>The area of the 60 degree circle segment is 1/6 of the area of the circle. There are 360 degrees in the circle. The area of a circle is pi * r * r or 36<em>pi. 1/6 of that is 6</em>pi.</p>
<p>The shaded area is then 18 * sqrt(3) - 6*pi</p>
<p>number 5 if the answer is 3 then I could explain but it’s really more analytical then intellectual. you just have to notice that the curves pass b 3 times</p>
<p>for 5</p>
<p>Draw a line through the point (x,y) = (0,b) parallel to the x axis. The equation of this line is y=b</p>
<p>That graph of y=f(x) intersects the line y=b at three points between x=-6 and x=6.</p>
<p>1) B
2) B
3) C
4) D
5) 3</p>
<p>thx to all of u
@BallsBalls i have a stupid question…in #4 how did u knw that b+90+c=180 i mean how did u knw that the third angle is 90?</p>
<p>For 4</p>
<p>The angle formed between the squares is 90 degrees: that’s because the side of the small square is perpendicular to the side of the large square.</p>
<p>Another way of solving this problem is to observe that the lines that form angle b are parallel to the lines that form angle c. From geometry there’s a theorem that states that when this is the case the angles are equal.</p>
<p>@fogcity man u r very useful!</p>
<p>That’s because when two square sides fall on each other, a 90 degree angle is formed.</p>
