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I am doing substitution, linear combination in algebra and I need a calculator to do my HW

I NEED HELP!!!!! THIS IS DUE TOMORROW!!!!!

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
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 If you type Cal, in the all programs. you will get a calculator.
Tom D. | Very patient Math Expert who likes to teachVery patient Math Expert who likes to te...
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There is probably a calculator built-in to your Operating System.  For Windows, press startup (Bottom left) and then type calculator in the window ("Search programs and files").  Macs probably also have them.
 
Google also provides one.  Just type "calculator" and woosh - you have one.
 
Google can also be used to plot functions.  Just type sin(x)/x in the Google search window- it's a cool function (sinc(x)) which has MANY applications in physics (RF).  Virtually any function of x can be plotted.  Just type the equation - ie: x^3 +12x^2 -4x +1 and hit enter - wooosh!!!
 
Handheld calculators are already obsolete ;-)
Bruce B. | Mathematics and Physics; Calculus and Mechanics SpecialtyMathematics and Physics; Calculus and Me...
4.8 4.8 (4 lesson ratings) (4)
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If you google 'online calculator' there are several that will show up that you can use for free.

I've personally found wolframalpha.com to be immensely helpful, but that one takes a little bit of getting used to.