Answer: 0.65 + 0.78s
Step-by-step explanation:
From the question, we are informed that Ray wants to buy a hat that costs $10 and some shirts that cost $12 each and that the sales tax rate is 6.5%.
We are further told that the expression 0.065(10+12s) can be used to calculate the amount of sales tax that Ray will pay on his entire purchase.
Therefore, expanding the expression will give:
= 0.065(10+12s)
= (0.065 × 10) + (0.065 × 12s)
= 0.65 + 0.78s