Final answer:
To find the total cost of buying 5 hats and 3 t-shirts, use the cost equation to plug in the values which gives c = 50 + 45, resulting in a total cost of $95.
Step-by-step explanation:
The total cost of buying 5 hats and 3 t-shirts, using the given cost equation c = 10h + 15t, can be calculated by substituting 'h' with 5 and 't' with 3. Therefore, the calculation would be:
c = 10(5) + 15(3)
Now, we simply do the arithmetic:
Adding these together gives us:
c = 50 + 45
c = 95
So the total cost of buying 5 hats and 3 t-shirts is $95.