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iren2701 [21]
2 years ago
13

Jennifer bought 12 pens. Out of 12 pens, 7 are blue and the rest are red.

Mathematics
1 answer:
alexdok [17]2 years ago
8 0

Answer:

The answer is 5:12

Step-by-step explanation:

It is 5:12 because We already know that 7 pens are blue. To find the number of red pens we must subtract 12 - 7 and get 5 as the number of red pens. Now knowing the no. of red pens and total number we can say the ratio of red pens to total no. is 5:12

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By solving given equations, the value of c is 30.

Given two equations

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These lines represents the same line for some constant c.

Value of c:

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3x + 6y = c-------------(2)

Dividing equation (2) by 3

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After solving the above equation, we get

x + 2y = c/3-----------(3)

Remember that a line is written as ax + by = c, in our case, both lines have a =1 and b = 2. Therefore, in orther that the two lines are equal, we need that, 10 = c/3

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