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usatestprep
in which expression is the coefficient of the n term -1?
a)
3n2 + 4n -1
b)
-3n2 + 5n + 4
c)
-2n - n + 5
d)
4n2 + n - 5

c) -2n - n + 5 because if there's no number in front of a variable, the coefficient is 1, and since n is negative, the coefficient is -1

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)