Answer:
Number line graph with closed circle on 30 and shading to the left
Step-by-step explanation:
we know that
The algebraic expression of the phrase " An unknown number x is at most 30" is equal to
[tex]x\leq 30[/tex]
The solution is the interval ------> (-∞,30]
All real numbers less than or equal to 30
Number line graph with closed circle on 30 and shading to the left
see the attached figure