Jin needs to fence in his rectangular backyard. the fence will have one long section away from, but parallel to, the length of his house and two shorter sides connecting that section to the house. the length of jin’s house is (3x+ 4) yd and the area of his backyard is (9x2+ 15x+ 4) yd^2. how many yards of fencing will jin need? a. (6x+ 2) yd c. (9x+ 6) yd b. (9x+ 9) yd d. (12x+ 10) yd hint: ^2 means squared.

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?