Deanna and lise are playing games at the arcade. deanna started with 15$ , and the macbine she is playing cost 0.75$ per game. lose started with 13$, and her machine costs $0.50 per game. after how many games will the two girls have the same amount of money remaining?

At 8 games, the girls will have the same ammount of money remaining.

Step-by-step explanation:

So we want to know at what time does these equations become the same. We simply write a equality like this:

$15-.75x=$13-.50x

We want to move the x over to the other side of the equation by simply doing this:

-.75x+.50x=13-15 --> Remember that this is a positive .50 because we did the opposite

Simplify

-.25x=-2 --> Remember that two negatives make a positive

x=8

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.

answer: -1

step-by-step explanation: