
The number line is shown in figure attached below.
Step-by-step explanation:
We need to solve the inequality
and find value of n.
Solving the inequality:

Multiplying -4 with terms inside the bracket.

Adding 12 on both sides:


Divide both sides by -4 and reverse the inequality:

The number line is shown in figure attached below.
The number line starts with 5 with unfilled hole because n is less than 5 and moves towards left of the number line, because all values less than 5 are included in number line.
Keywords: Solving inequalities
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Answer:
x = 30
ABC = 90
ACB = 30
Step-by-step explanation:
We know that if we add the 3 angles of a triangle together, it will come out to be 180 degrees, so..
60 + x + 3x = 180 subtract 60 from both sides and simplify
4x = 120 divide both sides by 4
x = 30
ABC = 3x
ABC = 3(30)
ABC = 90