Answer:
19 degrees
Step-by-step explanation:
12-(-7)= 19
(12+7=19)
The equation
represents the total cost, c, of buying x number of adult tickets and y number of child tickets.
Express 

Now divide this equation by 5:

Answer: correct choice is A
I am 99% sure it is D. Hope this helped! : )
A[1] = 14 . . . . . . . . . defines the first term
a[n+1] = a[n] -4 . . . says each term is 4 less than the one before it