Download CHAPTER 1 variableанаa letter used to represent a number

 CHAPTER 1
variable ­ a letter used to represent a number.
coefficient ­ the number which is before a variable. If there is no number
in front of the variable it is always 1.
constant ­ the same number used for the variable.
evaluate ­ to solve.
algebraic expression ­ an equation which uses both number and letters.
numerical expression ­ an equation which has only numbers.
multiplicative inverse ­ reciprocal.
solution ­ the answer.
solution set ­ all the solutions to an inequality.
inequality ­ compares 2 quantities and uses <, >, < , > , =
term ­ parts to be added or subtracted, a variable or # in a sequence.
Ex.
like term ­ terms with the same variables and exponents.
ex.
equivalent expression ­ has the same value for all similar variables.
Ordered pair­ the two numbers, written in parenthesis, used to plot a
point on the coordinate plane. (x,y) input the number used for x; output
the number used for y
coordinate plane ­ is two number lines that includes both positive and
negative numbers. The two number lines are called axes.
x ­ axis ­ is the horizontal line and the y ­ axis is the vertical line.
Origin ­ the point at which the x and y axis intersect. It's location is 0.
Coordinates ­ the numbers in the ordered pair.
Quadrants ­ the coordinate plane is divided into 4 quadrants.
absolute value ­ the distance a number is from zero. / / is the symbol
for absolute value.
base ­ the whole number.
exponent ­ show how many times a number is multiplied.
exponential form ­ how it is written as multiplication.
power ­ the term used for a number raised to an exponent.
real numbers ­ consist of all rational and irrational #'s
reciprocal ­(multiplicative inverse) when the numerator and
denominator are switched.
additive inverse ­ a number and its opposite
Natural #'s ­ the counting numbers starting with 1.
Whole #'s ­ the natural #'s plus zero.
Integers ­ all the whole #'s and their opposites.
Rational #'s ­ can be written in the form of a fraction or decimal.
terminating decimals­ decimals that end.
repeating decimals ­ decimal numbers that repeat in a pattern and
are symbolized by bar notation.
Irrational #'s ­ decimal numbers that never end.