To find out which company the O'Donnells should choose, we can set up equations for the total cost from each company based on their pricing structures.
Let \( x \) be the number of balloons ordered, which is given as 30.
For Balloon Express:
- Cost per balloon: $2
- Delivery fee: $10
The total cost can be calculated with the equation: \[ \text{Total Cost}_{\text{Balloon Express}} = 2x + 10 \]
Substituting \( x = 30 \): \[ \text{Total Cost}_{\text{Balloon Express}} = 2(30) + 10 = 60 + 10 = 70 \]
For Balloon Mania:
- Cost per balloon: $1.50
- Delivery fee: $20
The total cost can be calculated with the equation: \[ \text{Total Cost}_{\text{Balloon Mania}} = 1.5x + 20 \]
Substituting \( x = 30 \): \[ \text{Total Cost}_{\text{Balloon Mania}} = 1.5(30) + 20 = 45 + 20 = 65 \]
Now, let's compare the total costs:
- Total cost from Balloon Express: $70
- Total cost from Balloon Mania: $65
Conclusion:
The O'Donnells should choose Balloon Mania since their total cost is less. The savings can be calculated as follows: \[ \text{Savings} = \text{Total Cost}{\text{Balloon Express}} - \text{Total Cost}{\text{Balloon Mania}} = 70 - 65 = 5 \]
Thus, the O'Donnells should choose Balloon Mania; $5 savings.