Admission to the park costs $50, and then soft drinks inside the park cost $10 each.

If someone wants to enter the park and buy 3 soft drinks, the total cost would be $50 (admission) + $10 x 3 (soft drinks) = $50 + $30 = $80.

Admission to the park costs $50, and then soft drinks inside the park cost $10 each. Write an expression that represents the total spent at the park if you bought d amount of drinks upon entering

The expression that represents the total spent at the park if you bought "d" amount of drinks upon entering would be:

$50 + $10d