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Evaluating -x^2 + (yz - 3)^2 2009-09-28
From Kathy:
My daughter and I are having trouble solving this equation:

-x+ (yz 3)

if x=-4,y=2 and z=0 We are having difficulty with the -x part of the equation. Thanks

Answered by Penny Nom.
Evaluating numeric expressions 2009-02-10
From Jennifer:
Answered by Penny Nom.
Rewriting and evaluating formulas 2001-11-19
From A conserned mother:
Due to the wide range of temperatures experienced in Canada, engineers who construct roads must allow for expansion and contraction of the road surface. The following formula is used to calculate the amount of expansion E to allow for: E= kL(T-t), where k is the constant of expansion for the road surface. L is the length of the section of highway in metres. T is the temperature of the air in degrees Celsius. t is the temperature, in degress Celsius, at which the section of the highway was constructed.
Answered by Walter Whiteley.
Functions 2000-01-06
From Tori Morris:
Consider the function f(x)=x2-3. Which of the following are true?

  1. f(1)>f(0)
  2. f(2)>f(-3)
  3. f(2)=f(-2)
  4. f(-1)=f(3).
More than one answer can be true.

Answered by Penny Nom.



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