math
posted by robert on .
Solve the compund inequality and graph the solution.
4<t+2<4
First I did t+2>4 and I got t>2 and I did t+2<4 and i got t<2. Then I graphed it and I dot an open dot on 2 and 2. Is this right?
1<1/2x<1
I did 1/2x>1 and i got x>2 and i did 1/2x<1 and i got x<2. I graphed it and put a open dot on 2 and 2. Is this right?

no one is answering.

You made a small arithmetic error in
t+2>4
Should have been t > 6
Actually the easiest way to do these questions is to leave the compound inequality as it it and simply perform operations to isolate the variable between the two inequality signs.
In this case:
4<t+2<4 , now subtract 2 from each of the 3 parts
42 < t+22 < 42
6 < t < 2
Place an open dot on the 6 and the 2 and join with a solid line 
is the second queston right?