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Mathematics

2 answers:

Ivanshal [37]3 years ago

8 0

Answer:

box 1

y/x = 5/20 =1/4

y/x = 7/35 = 1/5

this is not proportion y/x is not the same

box 2

y/x = 15/40 = 3/8

y/x = 21/56 = 3/8

y/x = 27/72 = 3/8

this is proportional

y is 3/8 times x

Step-by-step explanation:

Zepler [3.9K]3 years ago

6 0

box 1

y/x = 5/20 =1/4

y/x = 7/35 = 1/5

this is not proportion y/x is not the same

box 2

y/x = 15/40 = 3/8

y/x = 21/56 = 3/8

y/x = 27/72 = 3/8

this is proportional

y is 3/8 times x

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Solve the equation by completing the square. Round to the nearest hundredth if necessary. x2 + 2x = 17

yawa3891 [41]

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Equation Given
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x² + 2x = 17

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Add the constant to make it perfect square
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x² + 2x + (2/2)² - ²(2/2)² = 17

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Evaluate the brackets
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x² + 2x + (1)² - ²(1)² = 17

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Form the perfect square
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(x + 1)² - 1 = 17

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Add 1 to both sides
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(x + 1)² = 17 + 1
(x + 1)² = 18

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Square root both sides
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√(x + 1)² = $\pm$ √18

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Solve for x
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x = 4.24 - 1 or - 4.24 -1

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Answer: x = x = 3.24 or - 5.24
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3 years ago

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tamaranim1 [39]

Answer:

30/552

Step-by-step explanation:

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