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kow [346]
3 years ago
15

20 points

Mathematics
1 answer:
Triss [41]3 years ago
6 0

Answer:

10 months

$500

Step-by-step explanation:

Option 1

  • 300 + 20x, where x is the number of months

Option 2

  • 100 + 40x

Both options reveal same amount:

  • 300 + 20x = 100 + 40x
  • 300 - 100 = 40x - 20x
  • 200 = 20x
  • x = 200/20
  • x= 10 months

Cost of notebook:

  • 300 + 20*10 = 300 + 200 = $500
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