After solving the equation (work shown in image) your answer would be x > -2. I drew an image of how the number line should look at least similar to, using the solution.
*whenever you divide or multiply with a negative number reverse/flip the sign
< or > signs will always have an open circle
≥ or ≤ signs will have a closed/filled in circle
TIP: To know which way the arrow should point, look at the sign and think of it as an arrow.
< would have the arrow on the number point
this way: <-
or > which would have the arrow on the number line point this way: ->
Answer: 120
You can do p/100 = is/of
40/100 = is/300
then multiply diagonally which is 40 and 300
divide by 100
or the easier way is you can multiply .4 and 300
Width=w
Length=l
Perimeter=p
p=2w+2l
l=20+w
p=2w+20+w+20+w
p=4w+40
4w+40=160
4w=160-40=120
w=120:4=30
w=30
l=20+w
l=20+30=50