The price for 3 sundaes and 3 milkshakes is $21. the price for 4 sundaes and 6 milkshakes is $34. how much does it cost for 1 sundae and 2 milkshakes?

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Find solution of the linear equation y = 2/3x + 1/3