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viktelen [127]
3 years ago
14

4. Kiran's uncle is 54 years old. He is 8 years older than three times Kiran's age. Find Kiran's age,​

Mathematics
1 answer:
levacccp [35]3 years ago
7 0

Kiran's age = x

Uncle's age = 54

Also,

Uncle's age = 8 + 3x

Now,

8 + 3x = 54

3x = 54 - 8

3x = 46

x = 46/3

x = 15.33

x = 15 (rounded)

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3 1/2 x 14 =___x 7 = ___
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Answer:

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Read 2 more answers
5x²+4x+3=0 solve for x​
juin [17]

Answer:

{ \underline{ \sf{x  \: is  \:  \: \{ \frac{ - 5 + i \sqrt{35} }{10} \} } \:  \: and \:  \:  \{ \frac{ - 5  - i \sqrt{35} }{10}  \}} }

Step-by-step explanation:

5 {x}^{2}  + 4x + 3 = 0

from quadratic formular:

{ \sf{x =  \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a} }}

general equation:

{ax}^{2}  +  bx + c = 0

a is 5, b is 4 and c is 3:

substitute in formular:

{ \sf{x =  \frac{ - 5± \sqrt{ {5}^{2} - (4 \times 5 \times 3) } }{(2 \times 5)} }} \\  \\ { \sf{x =  \frac{ - 5± \sqrt{ - 35} }{10} }}

but from complexes, <em>i</em><em>²</em><em> </em><em>=</em><em> </em><em>-</em><em>1</em>

{ \sf{x =  \frac{ - 5± \sqrt{35 {i}^{2} } }{10} }} \\  \\  = { \sf{x =   \frac{ - 5±i \sqrt{35} }{10} }}

6 0
3 years ago
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