Question

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

Answer 1

`(-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"`