plis apa.jawabannya bsk di kumpul

nomor 46
(a:c) . (b-a) = {(-10):(-5)} . {18-(-10)} = 2. 28 = 56

nomor 47
2.2.2.2.3.5 = 240 (KPK)
2.2.3 = 12 (FPB)

nomor 48
x^2 + 169 = 698
x^2 = 698 - 169 = 529
x = √529 = 23

nomor 49
s² = 25 x 16 = 400
s = √400 = 20

nomor 50
ikat bunga = FPB
2.2.3.5=60 ikat bunga
mawar = 360/60 = 6 tangkai
melati = 180 / 60 = 3 tangkai
sedap malam = 120/60 = 2 tangkai