An amusement park sold a total of 68 tickets. 43 of the tickets were child tickets, and the rest were adult tickets. What is the ratio of the number of adult tickets to the number of child tickets? Write your answer as a fraction. Use a slash ( / ) to separate the numerator and denominator.

The number of adult tickets is 68 - 43 = <<68-43=25>>25.

The ratio of the adult tickets to the child tickets is 25/43. Answer: \boxed{\frac{25}{43}}.

There are 15 female teachers and 7 male teachers at Richard's high school. What is the ratio of the number of male teachers to the number of female teachers? Write your answer as two numbers separated by a colon (for example, 2:3).

The ratio of the number of male teachers to the number of female teachers is 7:15. Answer: \boxed{7:15}.

Add: –14 + –5 + 4 =

-14 + -5 + 4 = \boxed{-15}.

Add: –10 + –15 + –12 + 19 =

-10 + -15 + -12 + 19 = \boxed{-18}.

Add: 2 + –6 + –10 + 0 =

2 + -6 + -10 + 0 = \boxed{-14}.

Add: –16 + –15 + 12 =

-16 + -15 + 12 = \boxed{-19}.