Final answer:
By subtracting the admission fee from the total money Mark has and dividing the remainder by the cost per ride, we find that Mark can afford 7 rides at the amusement park.
Step-by-step explanation:
Mark wants to determine how many rides he can enjoy at the amusement park given he has $26 to spend on an admission price of $15.50 and subsequent rides costing $1.50 each. First, we subtract the admission fee from the total amount Mark has to spend.
So, we calculate $26 - $15.50 = $10.50. This is the amount remaining for rides after Mark pays for his admission ticket.
Next, to find out how many rides he can afford, we divide the remaining money by the cost per ride:
$10.50 รท $1.50 = 7
Therefore, Mark can enjoy 7 rides in one day at the amusement park.