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Nikitich [7]
3 years ago
14

Can you help answer these:

Mathematics
2 answers:
Papessa [141]3 years ago
8 0

Step-by-step explanation:

  1. (-3)*(1+3) = -9
  2. (-3)*(-3) = 9
  3. (+20)(+5) =100
  4. (+21)(-3) = -63
  5. (-2)*(+3)*(-4) = 24
mojhsa [17]3 years ago
6 0

Answer:

1) -3 x 3=-9

2) -3x-3=9

3)20x5=100

4) 21x-3=-63

5) -2x3x-4=24

note: negative x positive= negative

negative x negative=positive

positive x positive= positive

Step-by-step explanation:

hope this is helpful

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