Answer:

Step-by-step explanation:
Exponential function
is
increasing if 
decreasing if 

5x-14x=9-90
-9x=-81
9x=81
x=81/9
x=9
Answer:
86.571428571
Step-by-step explanation:
If you use a table you see all the fractions next to each other and you see what did I do the get from this fraction to this fraction.