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svet-max [94.6K]
3 years ago
10

Which choice is equivalent to the expression below? √-121

Mathematics
2 answers:
Bezzdna [24]3 years ago
6 0
The answer would be d.11i
Kisachek [45]3 years ago
3 0
\bf \sqrt{-121}\implies \sqrt{(-1)(121)}\implies \sqrt{-1}\cdot \sqrt{121} 
\\\\\\
i\cdot  \sqrt{11^2}\implies  i\cdot 11\implies 11i
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Please answer fast!!!!!
BlackZzzverrR [31]

Answer:

x = 2

Step-by-step explanation:

note that 4096 = 8^{4} , then

8^{2x} = 8^{4}

Since bases on both sides are equal, both 8 , then equate the exponents

2x = 4 ( divide both sides by 2 )

x = 2

6 0
3 years ago
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8x+3y=4 <br> -7x+5y=-34 <br><br> Elimination using multiplication
irga5000 [103]

Answer:

x= 2    and y = -4

Step-by-step explanation:

8x + 3y = 4 ---------------------------------(1)

-7x + 5y = -34 -----------------------------(2)

Multiply through equation (1) by 5 and multiply through equation(2) by 3

40x + 15y = 20 ----------------------------(3)

-21x + 15y =-102----------------------------(4)

Subtract equation (4) from equation (3)

61x = 122

Divide both-side of the equation by 61

61x/61 = 122/61

(At the left-hand side of the equation 61 will cancel-out 61 leaving us with just x, while at the left-hand side of the equation 122 will be divided by 61)

x = 122/61

x=2

Substitute x= 2 into equation (1)

8x + 3y = 4

8(2) + 3y = 4

16 + 3y = 4

Subtract 16 from both-side of the equation

16-16 + 3y = 4-16

3y = -12

Divide both-side of the equation by 3

3y/3 = -12/3

y = -4

x= 2    and y = -4

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3 years ago
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The probability is 1/30
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if 2x = 4, then x = 2


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