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3 years ago

Please help my math question

Mathematics

1 answer:

melomori [17]3 years ago

3 0

Answer:

Step-by-step explanation:

y = -2x + 5

x = -4 ; y = -2*-4 +5 = 8+5 = 13

x = -3; y = -2*-3 + 5 = 6+5 =11

x = -2; y = -2*-2 + 5 = 4+5 = 9

x= -1; y = -2*-1 + 5 = 2+5 = 7

x = 0; y= -2*0 + 5 = 0+5 = 5

x= 1; y = -2*1 + 5 = -2 +5 = 3

x= 2; y = -2*2 + 5 = -4+5 =1

x=3; y= -2*3 + 5 = -6+5 = -1

x = 4; y = -2*4 + 5= -8 + 5 = -3

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a = 1

b = 2

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$x =( -2 + \sqrt{2^2 - 4*1*-16}) /2*1 \\x =( -2 + \sqrt{4 + 64}) /2\\x =( -2 + \sqrt{68} )/2\\x = ( -2 + \sqrt{4*17} )/2\\x = ( -2 + 2\sqrt{17} )/2\\x = - 1 + \sqrt{17}\\and\\\\x = - 1 - \sqrt{17}\\$

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2 years ago

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velikii [3]

Answer:

8 is the correct answer

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2 years ago