D = adult
c = child
t = total admission cost
t = 8d + 5c
t = 8(2) + 5(3) = $31
D is the answer. Hope this helped.
The problem is the number by the side
For this case we have that by definition, the equation of a line in the slope-intercept form is given by:

Where:
m: Is the slope
b: Is the cut-off point with the y axis
We have the following equation:

We manipulate algebraically:
We subtract 10 from both sides of the equation:

We subtract 3x from both sides of the equation:

We multiply by -1 on both sides of the equation:

We divide between 5 on both sides of the equation:

Thus, the equation in the slope-intercept form is 
Answer:

Answer:
8
Step-by-step explanation:
Substitute 3 for x
-2x + 14
-2(3) + 14
-6 + 14 = 8