Answer:
(5.5, 2.5)
Step-by-step explanation:
Plug in X and Y and guess is how I did it
Answer:
to sell 7000 it took 10 weeks
it took 3 weeks to sell 210 books
Step-by-step explanation:
Divide both sides by -3, and replace
with
. Then

Factorize the quadratic in
to get

which in turn means

But
for all real
, so we can ignore the first solution. This leaves us with

If we allow for any complex solution, then we can continue with the solution we ignored:

Answer:
D
Step-by-step explanation:
D is the only graph where the shaded region is on 6 and less.