I WILL GIVE ThING HELP I’m TIMED

The second one i think I'm not totally sure I'm sorry if i'm wrong!

Step-by-step explanation:

Step-by-step explanation:

Follow the steps below.

Multiply exponents by the exponent outside of the perentheses (2).

Subtract the variables' and non-variables' exponents from each other and divide the non-variables.

Solve for the non-variable.

Make the variables the denominator to remove the negative exponents and make them positive.

There is your answer

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

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.