Mood:
Now Playing: the music in my head
Order of operations: please excuse my dear aunt sally.
P-----------------Parentheses (grouping symbols)
E-----------------Exponents
MD----Multiplication and Divison have equal priority
AS----Addition and Subtraction have equal priority
Fahrenheit_to_Centigrate
(F)=5/9(F-32)
Algebraic function definitions are patterns. The input variable is teh variable inside the parentheses. Whenever a function is evaluated, we replace that variable with a number and that same number must be copied dutifully everywhere else the variable appears in the formula.
Inverse-an inverse process will "undo" the work of another process or function.
example: C=5/9(f-32)
we see that this is basically the same relationship from the previous section. If F is teh temperature in degrees fahrenheit, then C is the equivalent tempereature in degrees celsius/centigrate.
in fact, whenever we have an equation and one variable is isolated ( on the left, usually) as we see here, we would say that "C is a function of F or C depends on the F". In theory, the variable F could have appeared more than once on the right side.
Could we use algebra to solve for F (isolate f instead)? Yes.
Pagathorean Theorem- right triangles and distances.
The two sides which form the right angle are called the legs. Their lengths are usually denoted by the letters a and b. The longest side opposite the right angle is the hypotenuse, usually denoted by the letter c.
Volume= 1/3 pie r square h
Application- time * rate= distance
Application- interest=principal*rate*time
Principal= the amount of money initially borrowed.
Rate= the rate of interest, typically expressed as a percent per year (per annum), but we always convert it to a deciaml number.
Time= the term of the loan, typically given in years.
At the end of the term, we must pay back the original principal plus the accured simple interest.