- System of equations by addition method. 5x-7y=14 -2x+3y=-6?

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If the electron in an H atom is to make a transition from the 1st excited state to the 2nd excited state what frequency of photon is needed? List those solutions which are in the interval [0, 2π) for tan(6x)=1 How do I know how many times to multiply K? I got (pi)(k)/6 + pi/24? A pair of dice is rolled. what is the probability of a sum that is odd and greater than 5? How much monies is Yahoo worth? How much monies do the people working for them make? What is the sound level of a sound whose intensity is 7.3×10−6 W/m2 ?
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