Joey is constructing the circumscribed circle for △rst. he has already used his compass and straightedge to complete the part of the construction shown in the figure.

what could be his next step?

place the point of the compass on point r and draw an arc intersecting the two arcs x and y.
.
place the point of the compass on point s and draw an arc intersecting the two arcs x and y.
.
place the point of the compass on point t and draw an arc intersecting the two arcs x and y.
.
place the point of the compass on point a and draw an arc intersecting the two arcs x and y.

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.