1) Mary is six years older than her cousin Joan. The product of their ages is 135. Find their
ages

Mary-15

Joan-9

Step-by-step explanation:

1) create an equation with the information given:

x•(x+6)=135

2) using this create a quadratic equation by distributing and getting all the terms to one side:

y=x²+6x-135

3) finally use the quadratic formula, ((-b)±√(b²-(4•a•c)))/(2•a)

4) using this you will find the value for Joan's age. Add six to Joan's age to find Mary's

5) You can check your answer by multiplying them to see if they equal 135.

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.

understand that i don't know the answers

will someone answer his question