Hey there!
-9r
= -9(7)
= -9 + -9 + -9 + -9 + -9 + -9 + -9
= -9 - 9 - 9 - 9 - 9 - 9 - 9
= -18 - 18 - 18 - 9
= -36 - 18 - 9
= -54 - 9
= -63
Thus, your answer is: -63
Fun fact!
2 negatives equals positive
2 positives equals positive
1 negative & 1 positive equals negative
1 positive & 1 negative equals negative
That’s why your result was a negative because you had 1 negative (-9) and 1 positive (7)
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)