3 years ago

Helppppppppppppppppppppp

Mathematics

1 answer:

Alex_Xolod [135]3 years ago

5 0

Answer:

$\frac{ {x}^{2} + - 4x - 2 }{ {x}^{2} - 4 } + \frac{8x + 6}{{x}^{2} - 4} \\ = \frac{ {x}^{2} + - 4x + 8x - 2 + 6 }{ {x}^{2} - 4 } \\ = \frac{ {x}^{2} + 4x + 4 }{ {x}^{2} - 4 } \\ = \frac{ {(x + 2)}^{2} }{(x - 2)(x + 2)} \\ = \frac{x + 2}{x - 2}$

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A box contains

Kobotan [32]

Box 1 : 3 pencils + 7 pens = total of 10
probability of picking a pen is 7/10

box 2 : 3 pencils + 3 crayons = total of 6
probability of picking a crayon is 3/6 which reduces to 1/2

probability of picking both is (7/10 * 1/2) = 7/20 <==

5 0

3 years ago

[-x - 2y = 7<br> [3x + y = 6

ZanzabumX [31]

Answer:

$multipling \: eq \: by \: 3 \\ then \: we \: get \: - 3x - 6y = 21 \\ now \: add \: both \: eq \\ - 5y = 27 \\ y = - 5.4$