The value of a is negative in the equation y = ax 2 + bx + c. true or false

The given equation y=a represents  a degree 2 equation .The  equation drawn on a graph represents a parabola.The value of a decides if the parabola will open up or down.It can be negative or a positive number but not 0.

If a=0 then equation will represent a straight line .

If a is negative parabola opens down.If a is positive parabola open up.

The value of a is only negative is False.

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.