Question

lucas charges customers a one - time fee of $35, and $18 per hour to fix cell phones. which equation represents the total amount, t, lucas charges if it takes him h hours to fix a phone?
a ( t = 35 + 18h )
b ( t = 35h + 18 )
c ( t = 35 - 18h )
d ( t = 35h - 18 )

Explanation:

Step1: Analyze the cost components

The total cost \( T \) has two parts: a fixed one - time fee and a variable hourly fee. The one - time fee is \( 35 \), and the hourly fee is \( 18 \) per hour. If the time is \( h \) hours, the variable cost is \( 18h \).

Step2: Form the total cost equation

Using the formula \( T=\text{fixed cost}+\text{variable cost}\), substituting the values, we get \( T = 35+18h \).

Answer:

D. \( T = 35 + 18h \)