It depends what you are trying to accomplish, but sometimes you pick a value of x. For example, if you want to graph a function, one approach is to pick several different values of x, solve the equation for each value, and write that as a point on the graph. It may then be possible to connect the points into some kind of coherent shape (although this depends upon the particular function - some are easier to graph than others).
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f(x)= -x-9
it is just the number written out. So for the number 725: Scientific Notation = 7.25 x 102 Expanded Notation = 700 + 20 + 5 Standard Notation = 725 Number And Word Notation = 7.25 hundred x Hope It Helped x
f : x -> 3x + 2 where 0 < x <23.
The scientific notation for the number 9 is: 9 x 100
'Y' is a function 'f' of 'x': Y = f(x) . 'Z' is a function 'g' of 'y': Z = g [ f(x) ] .