If we know the cost of a ticket is $7, we can then write an equation in slope-intercept form for the amount it will cost to buy any amount of tickets.
If we denote x as the amount of tickets purchased, and c as the total cost, we can write the equation:

Since we can vary the amount of tickets purchased independently of the total amount, x (the amount of tickets purchased) will be the independent variable.
However, since y (the total cost) is directly dependent on the amount of tickets that are purchased, c is the dependent variable.
Answer:
2 hours
Step-by-step explanation:
Each hour, Sam earns $9
So 2 hours, Sam will earn 2 * $9 = $18
Thus, Sam will earn $18 in 2 hours working at the drugstore.
Answer:

Step-by-step explanation:
Density is defined as mass of an object divided by its volume.
#We calculate the volume of the cylinder:

Given the mass= 15.3kg and volume as above, we calculate density as:

Hence, the solid's density is 
(.1mi/1min)
1.39mi/13.9 min
You have to multiply the bottom and the top by the same number to get the answer, you're trying to make the denominator 13.9 for the amount do minutes so you multiply the numerator by 13.9 to get the numerator