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Karolina [17]
3 years ago
12

Please show me how you got the answer. thank you in advance.

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
5 0
Write an equation system based on the problem
We can write the equation for "Twice the price in Japan minus five times the price in India is $20.60" as
∴ 2j - 5i = 20.6  <em>(first equation)</em>
We can write the equation for "Thirty cents less than three times the lowest price is thirty cents" as
∴ 3i - 0.30 = 0.30  <em>(second equation)</em>

Solve the equations
First, solve the second equation to find the price in India
3i - 0.3 = 0.3
3i = 0.3 + 0.3
3i = 0.6
  i = 0.6/3
  i = 0.2

Second, solve the first equation by subtitution of the value of i to the equation
2j - 5i = 20.6
2j - 5(0.2) = 20.6
2j - 1 = 20.6
2j = 20.6 + 1
2j = 21.6
  j = 21.6/2
  j = 10.8

The price in India is $0.20 and the price in Japan is $10.80
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Corinne and Aretha are having a 26-mile race. Corinne gave Aretha a head start by letting her begin 3.5 miles in front of the st
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6 0
3 years ago
Read 2 more answers
If $7,500 investment earns $450 over 3 years what's the interest rate
tester [92]

Answer:

Rate is 2%

Step-by-step explanation:

Step one:

given data

Principal= $7500

Simple interest= $450

time=3 years.

Applying the simple interest formula which is

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Step two:

substitute we have

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cross multiply we have

45000=22500R

divide both sides by 22500

R=45000/22500

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2 years ago
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