Final answer:
By setting up simultaneous equations with the given transactions and solving them, we find that peach cobbler costs $2.00 per piece, and raspberry cobbler costs $3.00 per piece.
Step-by-step explanation:
To determine the price for a piece of peach cobbler and raspberry cobbler, let's set up two equations based on the information given. Let P represent the price per piece of peach cobbler and R represent the price per piece of raspberry cobbler.
From the first purchase, we have the equation: 3P + 4R = $18.00 (1)
From the second purchase, we have the equation: 6P + 5R = $27.00 (2)
To solve these equations simultaneously, one approach is to multiply the first equation by 2, so that the coefficient of P in both equations is the same:
2(3P + 4R) = 2($18.00)
6P + 8R = $36.00 (3)
Now, we subtract equation (2) from equation (3):
(6P + 8R) - (6P + 5R) = ($36.00 - $27.00)
3R = $9.00
R = $3.00 per piece of raspberry cobbler
Now, plug the value of R into equation (1):
3P + 4($3.00) = $18.00
3P + $12.00 = $18.00
3P = $18.00 - $12.00
3P = $6.00
P = $2.00 per piece of peach cobbler
Therefore, the correct answer is B. Peach cobbler costs $2.00 per piece, and raspberry cobbler costs $3.00 per piece.