In city A, the temperature rises 9 from 8a. m. To 9a. m then the temperature drops 8 from 9a. m. To 10a. m. In city b, the temperature drops 5 from 8a. m. To 9a. m. Then the temperature drops 4 from 9a. m. To 10a. m.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.