9students volunteer for a committee. how many different 2-person committees can be chosen?

72

36

362,880

1

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950