Answer:
(a) The system of equations is:
2r + b = 8.40
3r + b = 9.35
(b) The graph is attached down
(c) By using the graph
The cost of the refill is $0.95
The cost of the egg breakfast is $6.5
Step-by-step explanation:
Let r is the amount charged for a refill and b for the amount charged for the egg breakfast
∵ r is the amount charged for a refill
∵ b is the amount charged for the egg breakfast
∵ You ordered 2 drink refills and the egg breakfast, for a total of $8.40
∴ 2r + b = 8.40 ⇒ (1)
∵ Your friend ordered 3 refills and the egg breakfast for $9.35
∴ 3r + b = 9.35 ⇒ (2)
(a) The system of equations is:
2r + b = 8.40
3r + b = 9.35
(b) The graph is attached down
From the graph
The red line represents equation (1)
The blue line represents equation (2)
The two lines intersected at point (0.95, 6.5)
(c) By using the graph
The cost of the refill is $0.95
The cost of the egg breakfast is $6.5
