<p>Hi, I have a question that I have not been able to solve (yet):</p>
<p>(x-8)(x-k) = x^2 - 5kx + m</p>
<p>In the equation above, k and m are constants. If the equation is true for all values of x, what is the value of m?</p>
<p>Any help would be great. Thanks!</p>
<p>I think k = 2 and m = 16. Dude that was
super easy. I think you gonna do really bad on
the math part like below 500.</p>
<p>^copy dont be rude.</p>
<p>(x-8)(x-k)=x^2-kx-8x+8k=x^2 - 5kx + m</p>
<p>So, 8k=m. Replace m with 8k</p>
<p>x^2-kx-8x+8k=x^2-5kx+8k</p>
<p>Cancel 8k and x^2</p>
<p>-kx-8x=-5kx</p>
<p>-x(k+8)=-5kx</p>
<p>k+8=5k</p>
<p>4k=8</p>
<p>k=2</p>
<p>m=8k</p>
<p>m=8(2)=16</p>
<p>k=2, m=16</p>
<p>^thank you. I actually figured it out a few minutes after I posted this, but CC doesn’t let you delete.
@copy: I got a 730 the first time, a 34 on the math section in the ACT, and a 5 on the AP calc test. I’d say I’m pretty solid at math. It’s not my strongest subject but you don’t have to be a ****** about it.</p>
<p>How the **** did you get a 730 if you couldn’t figure
that one out? I go a 690 and I figured it out easily.</p>
<p>@copy: dude, one question isn’t the difference between a horrible score and a great score. Just because you could do that one question doesn’t mean that you’re great at math, just as me not being able to do it immediately doesn’t make me bad at math. Furthermore, that question was rated as a 5 in difficulty (the highest), so it isn’t supposed to be easy. I missed 3 questions the first time to get a 730. You are clearly not very informed about how the SAT scoring curves work if you think that not grasping one question completely torpedos your score.</p>
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<p>A 690? LOL. And you seemed so confident in your math skills that you didn’t mind making fun of others. Quelle surprise…</p>
<p>How the hell is that suppose to be a question with
the highest difficulty? Are they making the sat easier now?
And 314159265 you are right my math skills are really bad even
though I got a 750 on SAT II Math Level 2, 35 on ACT math, 5 on
BC, and an A+ in Multivariable calc at my college.</p>
<p>A 750 on Math II? By my standards, I’d say you just underperformed on test day (which happens to everybody). But by your standards (which is how I should probably judge you), I would consider that a failure.</p>
<p>@copy: wow, you got a 750 on the Math level 2 and a 690 on the SAT I and had the nerve to tell me that I’m going to get below a 500? This nearly made me laugh out loud.
And yes, that’s the highest level of difficulty, so if that question was so unbelievably easy for you, you presumably would’ve gotten well above a 690 on math and definitely above a 750 on math level 2, seeing as how that’s around the 75-80th percentile. It’s completely classless to attack the abilities of someone asking a question, but it’s even worse when you yourself haven’t done particularly well on the same test.</p>
<p>But seriously though if thats suppose to be a hard
question then can you give me an example of an easy
question? I’m really starting to think they are making the
sat easier.</p>
<p>well i remember only the last 2 of each section were hard, but the blue book rated ones that weren’t the last 2 as 5. anyway way to be a jerk. also… the sat will never get easier and if it does, the curve will adjust… but yea since its tested before hand (experimental) and the test matters a lot i would expect it to stay the same for a very long while.</p>
<p>^ the test doesn’t really matter.</p>
<p>yea the college admissions test that has been the most reliable for the longest time doesn’t matter…</p>