Here's the question you clicked on:
eknott
-4x+4>12 and 4x-9<-5
what do you need help with?
That IS a legit math question as I have encountered it before
the union of sets is the set of elements that is in the first set “or” the second set while the intersection of sets is the set of elements that are in the first set “and” the second set
in this case we are looking for an intersection
so, you will need to solve both for x and determine where on the number line the x values are
Then you will need to determine where x is in both sets at the same time....only those x values are your answer
since this is 14 days old I will try my hand at it
I have been trying for an hour to upload the image but oh well....the answer i got was \[(-\infty,-2) \]