3 years ago

Someone please help me!!!!!

Mathematics

1 answer:

Serggg [28]3 years ago

8 0

(3a-7)^2= (3a)^2 - 2*3a*7 + 7^2= 9a^2- 42a+ 49

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andrey2020 [161]

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What is the solution to the system of equations? Use the substitution method. {y=−2x+53x−4y=2

klio [65]

$y = - 2x + 53x - 4y = 2 \\ y = 51x - 4y = 2 \\ > y = 51 x - 4y \\ > 51x - 4y = 2$
$y = 51x - 4y \\ 5y = 51x \\ y = \frac{51}{5} x$
Substitute 51/5x into
$51x - 4( \frac{51}{5} x) = 2 \\ 51x - 40.8x = 2 \\ 10.2x = 2 \\ x = 2 \times \frac{10}{102} \\ x = \frac{10}{51} \: aka \: 0.196$
Substitute that into
$y = \frac{51}{5} \times \frac{10}{51} \\ y = 2$
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kondaur [170]

Answer:

-14x

Step-by-step explanation:

-4x+-10x =-14x

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Aliun [14]

2.5 years
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I hope this helps you:)

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lyudmila [28]

3h

Explanation:

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