kornfan39
Answered

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Sagot :

zarampa

Answer:

Step-by-step explanation:

Distributive property:

a(b-c) = a*b + a*-c = ab-ac

13.-    11(s+9) = 11*s + 11+9 = 11s+99

14.-    -21(x-7) = -21*x -21*-7 = -21x + 147

15.-    13(20-a) = 13*20 + 13*-a = -13a + 260

16.-    -8(17+b) = -8*17 -8*b = -8b - 136

17.-     (r+1.68)(-0.1) = -0.1(r+1.68) = -0.1*r - 0.1*1.68 = -0.1r - 0.168

18.-     3.25(5.02-t) = 3.25*5.02 + 3.25*-t = -3.25t + 16.315

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