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2 years ago

Santiago receives $179

Mathematics

1 answer:

Mashutka [201]2 years ago

3 0

9514 1404 393

Answer:

$400 at 2%
$900 at 3%
$3600 at 4%

Step-by-step explanation:

Let x represent the amount invested at 3%. Then (x -500) is the amount invested at 2%, and 4x is the amount invested at 4%. The total interest income is ...

0.02(x -500) + 0.03x + 0.04(4x) = 179

0.21x -10 = 179 . . . . . simplify

0.21x = 189 . . . . . . . . add 10

x = 900 . . . . . . . . . . . divide by 0.21

x -500 = 400

4x = 3600

$400 is invested at 2%; $900 is invested at 3%, $3600 is invested at 4%.

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Answer d)

6 0

3 years ago

a cargo ship arrived at Kingston Harbour carrying 403,172 kilograms of flour. All the flour was tranfered to 5 trains and 9 truc

IrinaVladis [17]

Each train carried 64141 kg of flour and each truck carried 9163 kg of flour.

Step-by-step explanation:

Let the no. of kg of flour carried by each train be 'a'

Let the no. of kg of flour carried by each truck be 'b'

Total flour = 403172 kg

No. Of trains = 5

No. of trucks = 9

a = 7(b)

5a + 9b = 403172

5(7b) + 9b = 403172

35b + 9b = 403172

44b = 403172

b = 403172/44

b = 9163

Each truck carried 9163 kg of flour.

a = 7b

a = 7(9163)

a = 64141

Each train carried 64141 kg of flour.

4 0

3 years ago

Santiago receives ​$179

Santiago receives $179