Answer:
the answer of ur language i can understand is only a . so the answer of a is
a)7
Answer:
3
Step-by-step explanation:
See the attached picture.
If one adult ticket costs
, then three adult tickets cost 
Similarly, if one child ticket costs
, then nine child tickets cost 
So, in total, the price will be

Answer:
slope = - 
Step-by-step explanation:
Calculate the slope m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (1, 4) and (x₂, y₂ ) = (13, 3)
m =
=
= - 