Option C:
c + p = 300
1 c + 0.50 p = 270
Solution:
Let "c" be the chocolate chip cookies.
Let "p" be the peanut butter cookies.
Total number of cookies sold = 300
⇒ c + p = 300 – – – – (1)
Cost of chocolate chip cookies = $1.00
Cost of peanut butter cookies = $0.50
Total amount collected = $270
⇒ (1.00 × c) + (0.50 × p) = 270
⇒ 1 c + 0.50 p = 270 – – – – (2)
The system of equations used to solve the given condition are
c + p = 300
1 c + 0.50 p = 270
Hence Option C is the correct answer.
