Ok...so for those Non-
ChaCha people, this will either be very interesting if you are a geek like me, or (more likely) very boring. If you ARE a
ChaCha person...consider this a small way to at least get a FEW .20 questions.
I'm really only good at basic math, algebra and geometry. Trig and calculus are over my head. I passed trig in college, but I remember none of it...and calculus...well, it's why I changed my major back from Computer Science to Recreation and Tourism.
First, the links. I have 5 I use religiously.
Math.com- Has a basic and scientific calculator (I almost always use the scientific because it has a decimal point-for some unknown reason, the basic doesn't), has a section on the right for "Geometry" and a section if you scroll down a little for fractions. Those are the main parts I use, but peruse it and do some reading in your spare (yeah...right) time.
Equation Calculator-good for anything that has an = sign...except if it has division. If you get one with division, it takes an extra step, but you can put it in. Some entry notes: if someone sends something that says either 2
xU2 or 2x squared, you enter this as 2x^2. To do multiplication, use *. You CAN have it solve for more than 1 variable, but it won't give you a number answer. And if you get something like 2x^2+x+4/3=3, multiply the 3 out and put 6x^2+3x+4=9 in the calculator. Or...if you don't want to multiply yourself, enter 3*2x^2+3*4+4=3*3. You DO have to get rid of the bottom of the fraction, but the rest it will do.
Factoring Calculator- good when they send you something without an = sign. This will simplify an expression (since it's not equal to anything, it's not an equation). Enter the same way as above. Also...there are other calculators on this site for things like greatest common factor, and least common denominator, etc. Peruse at your leisure.
Mathwords-Are they looking for a specific equation, or definition? Or, is there a word in there you don't know? Check here. It's basically a math dictionary in simple terms (mostly).
Root Calculator-There are square root calculators everywhere, but this one lets you enter what root you want. So if someone says the 4
th root of 16, put 4 in the top box and 16 in the bottom...
BAM. That's all there is to it.
100,000 pi digits-Exactly what it says. "What is pi to the 100
th place?" Takes a little counting, but it's right there. To go with it, I use
The history of Pi.
So, what type of questions do I get, and how do I do them? Here's the short version:
"Solve x^2-4" Notice...no = sign. That means we go straight to the factoring calculator. Put it in and get
this which says the answer is (2 + x)(-2 + x). Take that back to your guide console and say:
"The expression x^2-4 can be fully factored to (2 + x)(-2 + x)" plus whatever ending you like. That's it.
"Solve for x: x^2+2x-7=13"We have an = sign...that means the equation calculator (equals sign=equation...see how that works?) Put it in right like that, and after much scrolling, we get: x = {3.582575695, -5.582575695}. That's your answer...link it and write:
"For the equation x^2+2x-7=13, x can be equal to either 3.582575695 or -5.582575695." Plus your closing.
"What is the slope of y=3x+7"Slope, you say? What the hell is that? Head to
Mathwords. There are 3 listed, but 1 you really need. If you just need to know what "slope" means, it's "Slope of a Line" in almost every case. But, if they give you an equation (like here), go to "Slope Intercept Equation." This is a fairly popular item, so if you learn to recognize it, it helps. You don't need to remember what it means...just the format: y=
mx+b. There are variations: y=b+/-
mx, y+/-b=
mx...they all say the same thing. y=
mx+b This says m is the slope (what you are looking for here) and b is the y intercept. That's all you have to give them. Here's your answer:
"The slope of the line y=3x+7 is 3, and the y-intercept is 7. " Closing...and you even gave a Wow, because you gave the y-intercept that they didn't ask for.
"What is the square root of 16541638463843561"Some kid trying to play stump-the-guide. Guess what? We have calculators. Go straight to the Root Calculator. Copy/past their random string of numbers, put a 2 in the upper box. And I actually have this on clippings:
"The square root, which is any number multiplied by itself, of the number is . Keep
ChaChaing!"
I put in the number (after "number"...see the extra space there?) and the answer (before the period...also extra space). Less than 30 seconds. I actually have this in clippings too:
The square root of pi is 1.772453850880186. Anything else we can answer for you today? Keep
ChaChaing!
But I think it's a
PAQ now.
"The length of a square is 2 times the width, and the area is 74. What is the length and width?" Wow. Word problem. Looks hard. Guess what? It's really not. Area is length times width, but if you aren't sure, go to math.com, click Geometry, then Area of Polygons...it gives you all the various formulas. You have the area. Your length is 2 times the width. That's 2w. So 2w*w=74. Plug that into your equation solver...w = 6.08276253. You have your width. For your length, go back to the start: l=2w. Multiply your width by 2...you get 12.16552506. Here's your answer (and I usually use 2 links: math.com area of polygons and my equation solver)
"If the Length is 2 times the width, and area of a rectangle is l*w, 2w*w=74, giving you a width of 6.08276253 and a length of 12.16552506." Might be a few characters over, but you get the point.
"What is 15% of $75"
They are either looking for a sale price or a tip...so I give them both in one shot. Some it's easier to tell which (if it's 60%, you know it's not a tip). Go straight to the scientific calculator...do not pass go, only collect your .20 when you are done. :o) Enter this: 75 (times) .15 (equals). You get 11.25. That would be the "tip" amount...OR the amount of discount...so I go 1 step further (for the WOW): Subtract it out. 75-11.25=63.75. Here's your answer:
"Fifteen percent of $75 is $11.25. If you get a 15 percent discount, your price would be $63.75 plus tax." *closing* OR...I tell them how to do it:
"Fifteen percent of $75 is $11.25. This is found by multiplying 75 by .15, which is the decimal version of 15 percent." Either way, it's a Wow, since it's more than they asked for.
Ok...that's all the basic ones I can think of that I get consistently. If you have specific questions on these, you all know how to find me. :o) I will help where I can. For my Twitter buds...I don't get all messages to my phone, but I do get direct messages there...if you get stumped, I can try to help there even if I'm not online...but I go to bed at 10 and get up at 8-
ish...so between those times, I won't reply. Good luck, peeps!