Final answer:
To find out how many donuts Hazel bought, we can set up an equation: 2.15x + 3.12 = 72. Solving for x, we find that Hazel bought approximately 32 donuts.
Step-by-step explanation:
To find out how many donuts Hazel bought, we can set up an equation using the information given. Let's assume Hazel bought 'x' donuts. Each donut costs $2.15, so the total cost of the donuts would be 2.15 times x, which is 2.15x. Hazel also bought a drink for $3.12, so the total cost of the donuts and drink would be 2.15x + 3.12. The total amount spent is given as $72, so we can set up the equation 2.15x + 3.12 = 72. Now we can solve for x.
2.15x + 3.12 = 72
2.15x = 72 - 3.12
2.15x = 68.88
x = 68.88 / 2.15
x ≈ 32
Hazel bought approximately 32 donuts.