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Sedaia [141]
3 years ago
5

Which expressions are equivalent to 1/36?

Mathematics
2 answers:
Aleks04 [339]3 years ago
7 0

Answer:

b) 6^{-2}

c) \frac{6^3}{6^5}

f) 6^{-9} . 6^{7}

Step-by-step explanation:

The given expression is \frac{1}{36}

36 can be written as 6*6 = 6^{2}

So the given expression can be written as \frac{1}{6^2}

We can use the following exponent rules and write the given equation in different forms.

i) a^{-m} = \frac{1}{a^m}

ii) a^m *a^n = a^{m + n}

\frac{1}{6^2} = 6^{-2}

\frac{1}{6^2} = \frac{6^3}{6^5}

\frac{1}{6^2} = 6^{-9} . 6^{7}

Kamila [148]3 years ago
5 0
6^-2 , 6^3/6^5 , 6^-9 • 6^7. I believe these are the expressions that are equivalent to 1/36.
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The sum of all three numbers is 12. The sum of twice the first number, 4 times the second number, and 5 times the third number i
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Answer:

The numbers are 7, 4 and 1

Step-by-step explanation:

Let the numbers =x, y, z.

The sum of all three numbers is 12, x+y+z=12--------i

The sum of twice the first number, 4 times the second number, and 5 times the third number is 35, 2x+4y+5z=35-------ii

The difference between 8 times the first number and the second number is 52, 8x-y=52---------iii

Now, from (i),z =1-x-y--------iv

substitute (iv) in (ii),

2x+4y+5(12-x-y)=35

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collect like terms

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solving (iii) and (v) simultaneously (add iii and v), we have

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divide both sides by 11 to obtain x=7

Put x=7 in (v)

3(7)+y=25

21+y=25

implies y=25-21=4

put x=7 and y=4 in (iv)

z=12-7-4=1

Hence, the numbers are 7, 4 and 1.

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