Ahyperbola centered at the origin has a vertex at (0, 36) and a focus at (0, 39). which are the equations of the directrices? x = ±12/13 y = ±12/13 x = ± 432/13 y = ±432/13

Solve: 3x+y=6 4x-2y=18 show all work !

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c