How do you solve and write the following in interval notation: #x <= -7#?

1 Answer
Jim G.
May 7, 2017

#(-oo,-7]#

Explanation:

#"the inequality is already solved"#

#"that is " x<=-7" is the solution"#

#"this means that x can take values less than or equal to - 7"#

#"in interval notation this is expressed"#

#(-oo,-7]#

#"the parenthesis on the left indicates x cannot take this value"#

#"the 'square bracket' on the right indicates x can"#
#"take the value of - 7"#

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