<p>can someone plz explain the answers to the following questions: [Test 1]
Section 3: 12,13, 14
Section 6: 17, 18
Section 9: 15, 16</p>
<p>thnxs =]</p>
<h1>12</h1>
<p>Since f(x) is linear, a+x = 24 = b-x
a = 24-x
b = 24+x
a+b = 48+x-x = 48</p>
<p>So the answer is C.</p>
<h1>13</h1>
<p>Do some of the pattern on paper. You will notice the pattern.
3,5,-5,-3,3,5,-5,...
The pattern is obvious. It repeats every 4 terms so the 52nd term is the same as the 4th term. The 55th is the same as the 3rd term.</p>
<p>So the answer is A.</p>
<h1>14</h1>
<p>m = -y for reflections accross the x-axis.
Just flip all the signs for the equation.</p>
<p>So the answer is A.</p>
<h1>17</h1>
<p>Solve the equation for y.
y = sqrt(x+4) and y = -sqrt(x+4)
The highest slope occurs when the first point is at the lower value and the second point is at the higher value. Therefore the points are (0,-2) and (5,3).
The slope formula gives a slope of 5/5.</p>
<p>So the answer is 1.</p>
<h1>18</h1>
<p>Let us define x as the distance one way.
x/45 = time to get there
x/30 = time to get back
x/45+x/30 = 1 hour
75x/1350 = 1
x = 18</p>
<p>So the answer is 18.</p>
<h1>15</h1>
<p>The x value of the interesctions have to be 6 apart, so the x values are -3 and 3.
y = 3^2 = 9
So y = a-3^2 must also equal 9.
9 = a - 9
18 = a</p>
<p>So the answer is E.</p>
<h1>16</h1>
<p>Set z has all of x and all of y, but not the duplicates, k.
So set z =x+y-2k because the duplicate members were counted 2 times.</p>
<p>So the answer is D.</p>
<p>thank u soo much!</p>
<p>khoitrinh, you and lolilaughed are two of the smartest guys I've seen around on the forums. :P</p>
<p>Omg, you're comparing me to lolilaughed? I can't believe it. He's one of the Jonas Brothers you know. My name being said in the same breath as his. Wow.</p>
<p>:O I take back what I just said. I despise the Jonas Brothers. Lolilaughed has gone down considerably in my opinion. You're now greater than lolilaughed. ;)</p>
<p>Who're the Jonas Brothers?</p>