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gtnhenbr [62]
3 years ago
8

Tim is 9 years older than 3 times John’s age. If John is 13 years old, how old is Tim?

Mathematics
2 answers:
8_murik_8 [283]3 years ago
6 0

Answer:

Tim is 48

Step-by-step explanation:

13 x 3 = 39

39 + 9 = 48

If Tim is 3 times the age of John you multiply John's age (13) by 3 and add 9 to the sum because Tim is 9 years older.

oee [108]3 years ago
4 0

Answer:

48

Step-by-step explanation:

3 times 13 (john's age) = 39

39 + 9 = 48 (nine years older than 3 times (39) so you add 9)

Therefore, Tim is 48.

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Here we are given the three sides of the triangle.

So we have Heron's formula to find its area.

Heron's formula is given by :

A= \sqrt{S(S-A)(S-B)(S-C)}

where A, B and C are sides of triangle and S is semi perimeter which is given by,

S= \frac{A+B+C}{2}

plugging values of A, B and C to find S

S= \frac{9+6+12}{2}

S=13.5

Now plugging values of A, B , C and S in Heron's formula

A= \sqrt{13.5(13.5-9)(13.5-6)(13.5-12)}

A=26.14 mm²

Answer: Area of triangle is 26.14 mm².



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