How do you graph the solution to #-3(p-7)>=21# on a number line?

1 Answer
Jim G.
Mar 11, 2017

#p>=0#

Explanation:

Distribute the bracket.

#-3p+21>=21#

#"Isolate "-3p" by subtracting 21 from both sides"#

#=3pcancel(+21)cancel(-21)>=21-21#

#rArr-3p>=0#

#rArrp>=0" is the solution"#

To show the solution on a number line. Place a #color(blue)"filled in circle"# at zero. This indicates the solution can equal zero. Draw an #color(blue)"arrowed line"# from zero to the right indicating the direction of the solution.

If not equal to zero we use an #color(blue)"open circle"# at zero.

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