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Chapter 2 Vocab (no properties)
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Just Vocab no Properties
Terms in this set (31)
number line
a line with equal distances marked off to represent numbers
whole numbers
the set of these is represented by {0, 1, 2, 3, ...}
negative number
any number that is less than 0
integers
the set of numbers is represented as {..., -3, -2, -1, 0, 1, 2, 3, ...}
venn diagram
diagrams that use circles or ovals inside a rectangle to show relationships of sets
graph
to draw, or plot
coordinate
the number that corresponds to a point on a number line
line plot
numerical data displayed on a number line
absolute value
a number's distance from zero on a number line
adding integers
1. to add integers with the same sign, add their absolute values. Give the result the same sign as the integers. 2. To add integers with different signs, subtract the lesser absolute value from the greater absolute value from the greater absolute value. Give the result the same sign as the integer with the greater absolute value
opposites
a number's additive inverse
subtracting integers
to subtract a number, add its additive inverse. For any numbers a and b, a-b = a + (-b)
matrix
a rectangular arrangement of elements in rows and columns
discrete mathematics
a branch of mathematics that deals with finite or discontinuous quantities
rational numbers
a number that can be expressed in the form a/b , where a and b are integers and b does not = 0
comparing numbers on the number line
if a and b represents any numbers and the graph of a is to the left of the graph of b, then a<b. If the graph of a is to the right of the graph of b, then a>b
cross products
when two fractions are compared, the _____ ________ are the products of the terms on the diagonals
inequality
a mathematical sentence containing <, >, =, < or equal to, or > or equal to
Multiplying Two Rational Numbers
the product of two numbers having the same sign is positive. The product of two numbers having different signs is negative
scalar multiplication
in this, each element of a matrix is multiplied by a constant
dividing rational numbers
the quotient of two rational numbers having the same sign is positive. The quotient of two rational numbers having different signs is negative
complex fraction
a fraction is this if it has one or more fractions in the numerator or denominator
square root
one of two identical factors of a number; if x-squared = y, then x is a _____ ____ of y
perfect square
a rational number whose square root is a rational number
radical sign
the symbol √ , indicating the principal or nonnegative root of an expression
principal square root
the nonnegative square root of an expression
irrational number
a number that cannot be expressed in the form a/b, where a and b are integers and b does not = zero
real numbers
the set of rational numbers and the set of irrational numbers together form the set of...
problem solving plan
1. Explore the problem
2. Plan the solution.
3. Solve the problem.
4. Examine the solution.
defining the variable
choosing a variable to represent one of the unspecified numbers in a problem
formula
an equation that states a rule for the relationship between certain quantities
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