According to a weather service, the formula to calculate the average temperature in New Orleans for any given day of the year is T(x) = 20 + 8cos[ 2π 365 (x - 197)]. What is the average temperature in New Orleans on day 245 of the year? (to the nearest tenth °C)

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano