Final answer:
The equation representing the total minutes worked by nurses and support staff is 240x + 360y = 3000, while the equation representing the earnings for placed nurses and support staff is 90x + 120y = 1050. The system of equations can be solved to determine the number of nurses and support staff placed on that day.
Step-by-step explanation:
A. Let x represent the number of nurses and y represent the number of support staff. Since each nurse works 240 minutes and each support staff works 360 minutes, the total minutes worked by nurses and support staff on a given day can be expressed as the equation 240x + 360y = 3000.
B. The earnings for placed nurses and support staff on that day can be represented by the equation 90x + 120y = 1050.
C. To solve the system of equations, we can use the method of substitution or elimination. Solving these equations will give us the values of x and y, which represent the number of nurses and support staff. The solution will provide insights into the number of each personnel that were placed on that day.