9514 1404 393
Answer:
a, b
Step-by-step explanation:
This has to do with correctly using the distributive property to distribute a negative multiplier.
a) (5p -7) -(3p +1) = 5p -7 -3p -1 = (5-3)p +(-7-1) = 2p -8 . . . . true
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b) (10b +3) -(-2b +78) = 10b +3 +2b -78 = (10+2)b +(3 -78) = 12b -75 . . . . true
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c) (4h +2) -(h -6) = 4h +2 -h +6 = (4-1)h +(2+6) = 3h +8 . . . . not 3h-4 (false)
