3 years ago

How many different ways can four cars in a train be arranged?

Mathematics

1 answer:

mel-nik [20]3 years ago

7 0

The answere is 24 ways ( 4 × 3 × 2)

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2 is the coefficient because the coefficient always comes before the variable. In this case the variable is X, and 2 comes right before that signaling that it is (2)(x).

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2 years ago

Slope is known as the run over the rise. True or False

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Vinvika [58]

Answer:

Step-by-step explanation:

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Really need help guys!<br> Love you if you can solve them wiz steps!!!!

Marta_Voda [28]

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Step-by-step explanation:

$x^2+y^2-8x+4y+4=0\\\\a)\\\\x^2-8x+y^2+4y+4=0\\\\x^2-2*x*4+(y^2+2*y*2+2^2)=0\\\\x^2-2*x*4+4^2+(y+2)^2=4^2\\\\(x-4)^2+(y+2)^2=4^2\\$

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The radius of the circle is 4 units, coordinates of its centre are (4,-2).

$b)\\\\y=0\\x^2+0^2-8x+4*0+4=0\\x^2-8x+4=0\\a=1\ \ \ \ b=-8\ \ \ \ c=4\\D=(-8)^2-4*1*4\\D=64-14\\D=48\\\sqrt{D}=\sqrt{48} \\ \sqrt{D}=\sqrt{16*3} \\\sqrt{D}=\sqrt{4^2*3} \\\sqrt{D}=4\sqrt{3} \\\displaystyle\\x=\frac{-(-8)б4\sqrt{3} }{2*1} \\\\x=\frac{8б4\sqrt{3} }{2} \\x_1=4-2\sqrt{3} \\x_2=4+2\sqrt{3}$

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1 year ago

Select the equation of the line parallel to the equation 2x + 4y = -5 that passes through the point (-4, -8).

marusya05 [52]

The equation for the line will be x+2y=-20

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2 years ago