Chapter 5 bc miss neilson is crazy Flashcards
(17 cards)
why do we use scientific notation
to make big numbers easier to work with
what kind of number is the exponent is scientific notation
an integer
why/when do we use sig figs
your answer to the whole problem can only be as accurate as your least accurate measurement
what is a rational number
a number that can be expressed as a fraction
what is a rational expression
an expression that can be expressed as a quotient of polynomials
whats a rational function
a function that is defined by a simplified rational expression in one variable
when is a rational expression simplified
when its expressed as fraction with polynomials whose greatest common factor is one
when is a fraction a complex fraction
if its numerator and/or denominator has one or more fractions or powers with negative exponents
what is a fractional equation
an equation in which a variable occurs in the denominator
extraneous root
the root of the transformed equation that is not a root of the original equation
what is the domain of a function
all possible values of variable that give you a real solution
what are the zeros of a function
all the real values of the variable that will make the function as a whole equal to zero
what is an expression
a symbol or group of symbols used to represent a number
not trying to solve for anything
what is an equation
a sentence formed by placing an = sign between 2 expressions
trying to solve for something
what is an inequality
a sentence formed by placing an inequality symbol between 2 expressions
what is the difference between solving something and simplifying something
when you solve something, you are looking for a solution
when you simplify something, you just end up with a different version of the same expression and you are not looking for a solution
why can we cancel out y/y
because there is no addition/subtraction present and anything over itself = 1, which won’t change the value of our answer
