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Jet001 [13]
3 years ago
10

Mary weighs n kg while her sister weighs 15 kg less. How many times is Mary heavier than her sister?

Mathematics
2 answers:
leva [86]3 years ago
4 0

Answer: Mary is \dfrac{n}{n-15} times heavier then her sister.

Step-by-step explanation:

Given : Mary weighs n kg while her sister weighs 15 kg less.

Then, the expression to represent her sister's weight = n-15

Now, the number of times Mary is heavier than her sister is given by :-

\dfrac{\text{Mary's weight}}{\text{Sister's weight}}\\\\=\dfrac{n}{n-15}

Hence, Mary is \dfrac{n}{n-15} times heavier then her sister.

kari74 [83]3 years ago
3 0

Answer:

Mary is  \frac{n}{n-15}  times heavier than her sister

Step-by-step explanation:

Mary's Weight = n

Sister's Weight = n - 15

To find how many times mary is heavier, we need to multiply "that many time" [let it be x] with sister's weight to get Mary's weight.

<u>e.g. </u>If someone weighs 100 and another person 50, 50 * 2 = 100, thus, 100 kg person is 2 times heaving. We do same for this:

(n - 15) * x = n

x = n/(n - 15)

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Other than using the plain special aspect of a 45-45-90 triangle where the legs are x, x, and x√2, you can solve for this.

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