<p>I looked all over for this one. I know it's something simple I'm missing but I can't figure it out</p>
<p>It has a graph of a parabola on top of a rectangle, you can see from the coordinates that the base is 2 and you know that the perimeter is 10 because it tells you that.</p>
<p>From that I know that the other side is equal to 3, which is the answer, but the question asks for the value of a when y=ax^2. The answer is 3, but WHY?</p>
<p>thanks</p>
<p>Basically, when you have an equation, plug in for x and y. your description isn't 100% precise, but if you look at the actual graph:</p>
<p>point R must be at (1,3)-- the y coordinate because as u figured outthe other side is 3.</p>
<p>and since R lies on the parabola, that point must also fulfill the equation
y=ax^2.
y=3, x=1</p>
<p>3=a(1)^2
a=3</p>
<p>cool, thanks I knew it was something simple I had forgotten</p>
<p>sure no prob</p>
<p>lol, what about 14, anyone wanna give that one a go? same page it has a diagram so I can't explain it well enough</p>
<p>For that one I chose my own #s. I said that Y was 50, so angle ABC had measure 50 since they're parallel lines. So both the angles of ABC are 25, which means that the corresponding angle to X is 25(the angle that is opposite one of the 25 angles of ABC), which means that X is 25.</p>
<p>thanks rahoul, you've been a big help in my math prep hopefully it will pay off tomorrow lol</p>