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C. Multiply.
11. (-12) x (+15) =
12. (-4) x (-13) =
13. (+9) x (+ 13) =
14. (-14) x (+2) =
15. (+24) X (-3) =​


Sagot :

Answer:

11. -180

12. 52

13. 117

14. -28

15. -72

Step-by-step explanation:

- x - = +

+ x - = -

+ x + = +