Which of these numbers 3,4,18,111,123,340,345,456,555 are multiples of 3 but not 9?

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Step-by-step explanation:

3, 111, 123, 345, 456, 555

Step-by-step explanation:

Just go through and divide each by three and nine. If you get a whole number for three but not for nine then that's one of your answers.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is