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Mathematics 21 Online
OpenStudy (anonymous):

Which graph represents the solution set for the compound inequality −3 ≤ −2x + 1 < 11? A number line ranging from negative six to 6 with an open circle over negative five and a closed circle over two, shaded in between the numbers. A number line ranging from negative six to 6 with an open circle over negative two and a closed circle over five, shaded in between the numbers. A number line ranging from negative six to 6 with closed circle over negative five and an open circle over two, shaded in between the numbers. A number line ranging from negative six to 6 with an open circle ove

OpenStudy (debbieg):

What did you get for your solution to the inequality?

OpenStudy (texaschic101):

did you solve the inequalities ?

OpenStudy (anonymous):

Idk

OpenStudy (anonymous):

no

OpenStudy (texaschic101):

do you know how ?

OpenStudy (anonymous):

nope i think

OpenStudy (texaschic101):

do you know how to solve equations ?

OpenStudy (texaschic101):

-3 <= -2x + 1 -3 - 1 <= -2x -4 <= -2x 2 >= x (you change the inequality sign when dividing/multiplying by a negative. -2x + 1 < 11 -2x < 11 - 1 -2x < 10 x > -5 (change the inequality) do you understand how I did that ? They are pretty much solved the same way as equations except for the rule about changing the sign when dividing/multiplying by a negative.

OpenStudy (texaschic101):

if there is an equal sign involved, the circle will be closed. if there is no equal sign, then the circle is open. if it is less then, shading goes to the left. if it is greater then, shading goes to the right.

OpenStudy (texaschic101):

so we have 2 > = x or x < = 2 and x > -5 can you figure out the graph ?

OpenStudy (anonymous):

nope

OpenStudy (anonymous):

is it A

OpenStudy (texaschic101):

BINGO.....you got it. Good job.

OpenStudy (anonymous):

yes thank you

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