SOLUTION: I need help solving this inequality. I don't understand how to find the answer for both sides. 8th grade algebra for my homework. Thank You
|3.5z|>|7|
Algebra ->
Inequalities
-> SOLUTION: I need help solving this inequality. I don't understand how to find the answer for both sides. 8th grade algebra for my homework. Thank You
|3.5z|>|7|
Log On
Question 210779: I need help solving this inequality. I don't understand how to find the answer for both sides. 8th grade algebra for my homework. Thank You
|3.5z|>|7| Answer by Edwin McCravy(20060) (Show Source):
You can put this solution on YOUR website! I need help solving this inequality. I don't understand how to find the answer for both sides. 8th grade algebra for my homework. Thank You
|3.5z| > |7|
The absolute value of 7 is just 7, so the right side
is just 7
|3.5z| > 7
Since 3.5 is positive, we may write
the left side as
3.5|z| > 7
Divide both sides by 3.5
|z| > 2
So the distance any number which variable z can take
on must be more than 2 units from 0, on either side
of 0, so the graph of the inequality on a number line is:
<================o-----------o===============>
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
In interval notation the solution set is written:
In set-builder notation the solution set is written
{z|z<-2 OR z>2}
Edwin