please help! at a recent cross country meet, spectators had to pay to get in. it cost $7 for adults and $3 for students. the booster club selling tickets let's forgot to keep track of how many adults and student tickets they sold. however, they did know they sold 155 total tickets and made $645. write a system of equations to model this situation

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Select the quadratic that has root x = 8 and x = -5

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?