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Ber [7]
3 years ago
15

I=$54, P=$900, t=18 months what the asnwer

Mathematics
1 answer:
solniwko [45]3 years ago
4 0
Assume simple interest.
I=Pin
=>
54=900*i*(18/12)
=>
i=54/900*12/18
=0.04
=4%

Annual simple interest rate is 4%
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Step-by-step explanation:

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Let,

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Multiplying Eqn 1 by 1.75

1.75(x+y=613)\\1.75x+1.75y=1072.75\ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(1.75x+2.25y)-(1.75x+1.75y)=1184.75-1072.75\\1.75x+2.25y-1.75x-1.75y=112.00\\0.50y=112.00

Dividing both sides by 0.50

\frac{0.50y}{0.50}=\frac{112.00}{0.50}\\y=224

Putting y=224 in Eqn 1

x+224=613\\x=613-224\\x=389\\

389 children and 224 adults were at the pool that day.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/11236033
  • brainly.com/question/11306893

#LearnwithBrainly

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