Question:
System of linear equations
1. Emily Harrington made two investments for one year totaling $7,000. The interest rates were 4% and 7%. If she received $415 in interest, how much money was invested at each rate?
at 4%
at 7%
2. Two lengths of wire total 132 fest. One length is 42 feet longer than the other. How long is each length of the wire?
And
3. For the first performance at the Overton Park Shell, 40 reserved seats and 80 general admission seats were sold for $2,000. For the second performance, 50 reserved seats and 90 general admission seats were sold for $2,350. What was the cost for a reserved seat and for a general admission seat?
Reserved seat cost:
General admission seat cost: