Respuesta :
Answer:
if u have any doubts feel free to ask :)
Step-by-step explanation:
Sum of ratio : 9 + 7 + 4 = 20
a)
Adele share :
          [tex]\frac{9}{20} \times 680 = 9 \times 34 = \$ 306[/tex]
b)
Barbara share :
          [tex]\frac{7}{20} \times 680 = 7 \times 34 =\$ 238[/tex]
Collette share :
           [tex]\frac{4}{20} \times 680 = 4 \times 34 = \$ 136[/tex]
c)
  $       €
 1.125      1
 306       x
  [tex]\frac{1.125}{306} = \frac{1}{x}[/tex]      [cross multiply]
[tex]x =\frac{ 306} {1.125}[/tex]
x = €272
Adele receives = €272
d)
Apple     Cost
 1 kg     2.69
 5 kg      y
y = 2.69 x 5 = $13.45
Cost of 5kg of apples = $13.45
Cost of 3 kg bananas = 17.56 - 13.45 = $4.11
Banana       Cost
 3kg         4.11
  1 kg         z
 Â
 [tex]z = \frac{4.11}{3}[/tex]
z = $1.37
Cost per kilogram of banana = $1.37
e) Collette share = $136
Half of it on clothes = (1/2) x 136 = $68
(1/5) of her share on books = (1/5) x 136 = 27.20
Balance amount with her = 136 - 27.20 - 68 = $ 40.80
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