How do you solve and graph $3x>=15$ ?

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Answer 1 · 2016-07-31T21:01:39

$x>=5$

$x$ assumes all the values that are 5 or higher

Divide both sides by 3 giving

$3/3x>=15/3$

$1xx x>=5$

$x>=5$

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$color(blue)("A note about drawing the graph")$

Just for a moment, suppose that the answer was $x>5$

This means that $x$ can never actually take on the value of 5. It is always a higher value no matter how small the difference.

In this case the line plotted would be a dotted line

Now consider the actual answer of $x>=5$

This means that $x$ can actually assume the value of 5 so you would draw a solid line

Tony B

How do you solve and graph 3x>=153x>=15?