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lynnaespencer
24.04.2021 •
Physics
An electromagnetic wave of frequency 7.55 x 10^14 Hz propagates in carbon tetrachloride with a speed of 2.05 x 10^8 m/s. What is the wavelength of the wave in carbon tetrachloride?
A. 3.38 x 10^-7 m
B. 3.61 x 10^-7 m
C. 3.97 x 10^-7 m
D. 3.01 x 10^-7 m
E. 2.72 x 10^-7 m
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Ответ:
(4, -4)
Step-by-step explanation:
By plugging in the 4 and -4 for x and y respectively, you come up with a true statement, which means it is the correct answer choice.
-5(4) - 4(-4) = -4
-20 + 16 = -4 . (remember multiplying two negatives = a positive)
25(4) + 20(-4)
100 + (-80) = 20