The high school band sold 500 tickets for a concert. The price of an adult ticket was $14.50, and the price of a student ticket was $9.50. The total amount of money collected was $5,860. Which system of linear equations can be used to find a, the number of adult tickets sold, and s, the number of student tickets sold?

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?