Answer :

you would multiply -3 by 7, and get -21. then you would add 5. the denominator stays the same, so the answer is D
To change a mixed number to a improper fraction, first multiply the whole number by the denominator, then add the numerator;the denominator stays the same. 

[tex]-3 \frac{5}{7}= \frac{-3*7+5}{7}= \frac{-16}{7} [/tex]

I think the choices are wrong
The answer is -16/7

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