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primary 6 | Maths
| Algebra
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Help as soon as possible this is due at 5:30 PM at the 15th of December 2019
Date Posted: 5 years ago
Views: 306
Question is faulty. The unit for the number of pens cannot be “cents”.
4 pens cost p cents.
So,
p cents —> 4 pens
1 cent —> (4/p) pens where my / denotes the divide symbol
200 cents —> 200 x (4/p) = 800/p pens
So $2 can buy 800/p pens.
For example, say p = 100, such that 4 pens cost 100 cents. You can work out by normal ratio or numbers that 8 pens cost 200 cents. Using the expression p = 100, we see that 800/100 = 8, which is correct.
4 pens cost p cents.
So,
p cents —> 4 pens
1 cent —> (4/p) pens where my / denotes the divide symbol
200 cents —> 200 x (4/p) = 800/p pens
So $2 can buy 800/p pens.
For example, say p = 100, such that 4 pens cost 100 cents. You can work out by normal ratio or numbers that 8 pens cost 200 cents. Using the expression p = 100, we see that 800/100 = 8, which is correct.
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Date Posted:
5 years ago
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