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2 years ago

If 2k - 3 = 9 (k+7)-3 then k is ????

Mathematics

2 answers:

Akimi4 [234]2 years ago

6 0

Answer:

K = -9

Step-by-step explanation:

2k-3 = 9(k+7)-3

2k-3 = 9k+63-3

2k-3 = 9k+60

2k-9k = 60+3

-7k = 63

-k = 9

k = -9

m_a_m_a [10]2 years ago

4 0

Answer:

k= -9

Step-by-step explanation:

2k-3=9k+63-3 [expand the 9(k+7) first]

2k-9k=63-3+3 [put the like terms together]

-7k=63 [do the simple math]

k= 63 ÷ by -7

k=-9

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kiruha [24]

For this case we have the following expression:

$\frac {216 ^ {n-2}} {(\frac {1} {36}) ^ {3n}} = 216$

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Rewriting:

$(6 ^ 3) ^ {n-3} = (\frac {1} {6 ^ 2}) ^ {3n}\\6 ^ {3n-9} = \frac {1} {6 ^ {6n}}\\6^{ 3n-9} * 6^{ 6n} = 1$

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