WORK
Double 14 is 24, but to show that in an expression you must put 14×2.
Put that in parenthesis to show you must do that first =(14×2).
Add -9 after (14×2) and that equals 15.
ANSWER
(14×2)-9= 15
He would need to build 38 shelves.
I don’t have an explanation, I am really bad at those
Hope this sort of helps!
Answer:
See explanation
Step-by-step explanation:
Now we have to know what type of sequence that 6, 18, 54, 162,... is
Recall that for a geometric sequence, the common ratio (r) is constant
r = 18/6 = 3
r = 54/18 = 3
r = 162/54 = 3
The recursive formula for the geometric sequence is; 
The iterative formula is 