5. a) If x² + y2 + z = xy + yz + zx, show that a**- y ayy-2 a Z-X = 1 a" a* ay​

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

3.4a=57.8 what is the the value of a