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castortr0y [4]
3 years ago
8

Find the difference: square root of 20 - square root of 80

Mathematics
2 answers:
Mamont248 [21]3 years ago
8 0

Answer:

-2\sqrt{5}

Step-by-step explanation:

\sqrt{20} = \sqrt{10*2} = \sqrt{5 * 2 *2} = \sqrt{2^2 * 5} = 2\sqrt{5}   \\\\\sqrt{80} = \sqrt{20*4} = \sqrt{5*4 *4} = \sqrt{4^2 * 5} = 4\sqrt{5}   \\\\2\sqrt{5} - 4\sqrt{5} = -2\sqrt{5}

Volgvan3 years ago
5 0

Answer:

b

Step-by-step explanation:

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What is the value of the x and the y? -3x-7y=-63
PIT_PIT [208]

Step-by-step explanation:

-3x - 7y = -63

-(3x + 7y) = -63

3x + 7y = -63/-1

3x + 7y = 63

Value of x

3x + 7y = 63

3x = 63 - 7y

x = (63 - 7y)/3

Value of y

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2 years ago
If J is between H and K and HJ = 3(x + 2), JK = 3x -4 and KH = 44. What is the value of HJ?
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7 0
3 years ago
??????? Which exspression represents the total cost of the red shirts?
Vlad1618 [11]

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8 0
3 years ago
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Fantom [35]

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Add - 84+40=124
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3 years ago
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