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Algebra
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Suppose  varies jointly as  and the cube of . If  when  and , what is  when  and 

Apr 28th, 2015

"varies directly" means that you have two numbers or terms that are directly related such as ax = by where a varies directly with b, "varies indirectly" means x = 1/y where x varies indirectly with y.

"Cube of" = multiply number by itself 3 times (3*3*3 = 3^3 three to the cube power)

"cube root of " - similar to square root of but instead of square root, you take the cube root, example CUBE ROOT (27) = 3 (since 3*3*3 = 27).

If, when:  f (x) = 5/x IF x DOES NOT EQUAL 0, f(x) has a domain of all real numbers except x=0.

Example: if x>0, then y=2, so this would be part of a segment function where y=2 (horizontal line at y=2) for all values of x greater than zero.  Another part of the function could be If x < 0, then y=1

If, Then combinations are also used extensively in computer programs,

What is, when.... example f(x) = x^2 + 5,  WHAT IS F(X) WHEN X=3, so substitute 3 for x: (3)^2 + 5 = 9 + 5 = 11.

Let me know if you have any other questions about algebra terms, definitions, etc.

Apr 28th, 2015

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