Art and Bette Meish purchased 40 stamps, a mixture of 32c and 19¢ stamps. Find the number of each type of stamp if they spent $12.15.​

What is the missing value in the proportion 4/5 = x/30

X+y ≥20 x≤2y a) (0,22) b) (7,11) c) ( 15,6) d) (10,10) e) (12,5) f) (8,16)

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.