John is buying fencing for his yard. he pays $122 for 5 fence boards and 4 fence panels. he pays $570 for 21 fence boards and 20 fence panels. how much does one fence board cost? how much does he pay for 3 fence panels?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Write the equation in logarithmic form e^x=403.429