The slope-intercept form:

m - slope
b - y-intercept
We have m = 2 and b = 3. Substitute:

Answer: -0.25
Explanation:
Let T = total cost
Let 8c = total amount of children tickets
Let 12a = total amount of adult tickets
T = 8c + 12a
Answer: 33
Step-by-step explanation: substitute a with 22 and c with 11.
22+11=33