If 2/3 of the cards are face-up, then 2/3*12=8 cards are face-up. The remaining 12-8=4 cards are therefore face down.
Basically ur just looking for the LCM (lowest common multiple) of all of these numbers.
3,7,12,14....lowest number that all 4 of these numbers go into evenly is 84.
so they will ring together next in 84 minutes (1 hr 24 minutes) making it 5:24 a.m.
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You want to undo the (-9 1/2), so you will add 9 1/2 to each side
(x-1)(x+1)(x-3)(x+3)
x²-y² formula
Mark brainliest please
