(X+3)(x+7) X+7
————— = ——
(X-3)(x+3) X-3
Answer:
option 4
Step-by-step explanation:
Answer:
Choice A
1/17; no, they are dependent events
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Explanation:
There are 13 spades and 52 cards total. So 13/52 = 1/4 is the probability of drawing one spade
If we do not replace the card we pull out, then the probability of another spade is 12/51 since there are 12 spades left out of 51 total.
Multiply the fractions 1/4 and 12/51 to get
(1/4)*(12/51) = (1*12)/(4*51) = 12/204 = 1/17
The two events are not independent because the second event (pulling out a second spade) depends entirely on what happens in the first event (pulling out a first spade). The fact that the probability is altered indicates we have dependent events.
Answer: x= (y+z-a)/3
Step-by-step explanation:
You need to move every thing but the x on the other side, so subtract a and divide the whole thing by 3.
