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solving inequalities & Interval notations

Across
an area of territory owned or controlled by a ruler or government.
an intervening time or space.
value that represents a quantity along a line.
difference in size, degree, circumstances,
Any (>)interval is an open set.
including or covering all the services,
find an answer to, explanation for
symbols, such as parentheses, that are most often used to create groups or clarify the order that operations are to be done in an algebraic expression
the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
Down
the area of variation between upper and lower limits on a particular scale.
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity
used to write sets, often sets with an infinite number of elements
word, clause, or sentence inserted as an explanation or afterthought into a passage that is grammatically complete without it, in writing usually marked off by curved brackets
of the same measure, quantity, amount, or number as another.
an intervening time or space.
the final stage
a thing that is composed of two or more separate elements
set is a set whose complement is not an open set.
(<) is a symbol used to compare two numbers, with the lesser number given first.