The product of 15 and

is

. This is a linear binomial.

is a cubic trinomial. In your original question, I'm not sure what the

means.
3285 days.This is the answer.
Answer:
Cost of the coat = $54
Step-by-step explanation:
Given:
She saved = $ 9
To Find:
Cost of the coat = ?
Solution:
Let the price of coat be x
She saved $9
and according to given condition it is 1/6 of the total money she needs for buying coat
by this we have

Multiplying both sides by 6

it becomes
x = 9*6
x = $54
As x is the amount she needs
so
Cost of the coat = $54
Let lucy = l & neighbour= n
l = n +4
l + n= 14 years
substitute l with n +4
(n +4) + n = 14
2n +4 =14
n=5 years
l = n + 4 lets substitute n with 5
l = 5 + 4
lucy = 9 years