Nadia walks at an average speed of (x + 2) km/h for (x - 3) hours and cycles at an average speed of
(3x + 5) km/h for x hours. She covers a total
distance of 74 km.
(i) Form an equation in x and show that it reduces
to 4x2 + 4x - 80 = 0.
(ii) Solve the equation 4x2 + 4x – 80 = 0.
(iii) Find the time taken for her entire journey.

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: you need to organize this better it does not make sense.

step-by-step explanation: ?

b

step-by-step explanation:

i dont know

77

step-by-step explanation: