Iynu \( c=10+5 h \quad c=10+5(5)=10+25=3 \) Robert \( c=7.50 \times h \quad c=7.50 \times 5=37.50 \) \( 10+5 h=7.50 \)

It seems like you're working on a comparison of costs or fees based on hours worked for two different scenarios. In your first equation for Iynu, \( c = 10 + 5h \), the total cost increases as the hours increase due to the hourly rate, plus there's a base fee. On the other hand, Robert's model, \( c = 7.50 \times h \), shows a straightforward multiplication of the hourly rate by the hours worked without a base fee, which can lead to a lower cost for the same hours worked. To avoid any calculations getting mixed up, always check your units and ensure that the values you substitute make sense within the context of the problem. Additionally, it can be easy to miscalculate the final costs; double-check your arithmetic to ensure accuracy! If you find that you frequently miss details in calculations, take a moment to write out each step clearly or draw a simple diagram for visual aid.