How many ways are there of choosing 5 objects, without replacement, from 15 distinct objects, ifthe order of the choices is not taken into consideration?the order of the choices is taken into consideration?

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problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

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answer: d.) the total number of protons and neutrons is 15

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