AP Calculus AB (Algebra Review)
posted by Susan on .
Show that if x + 3 < 1/2, then 4x + 13 < 3.
I have no idea how to do this. I thought I might have to use the triangle inequality thing but that got me no where
for the first equation I got a soultion of
(7/2, 5/2)
and for the second soultion i got
(4, 5/2)
I thought it was interesting that the upper end points on both were the same but the beggining differ by half in magnitude so I don't know how to do this problem if you could show me that would be great thanks

We know that x is between 7/2 and 5/2
If x = 7/2, what is 4x+13? answer 2
If x = 5/2, what is 4x+13? answer 3