2 years ago

X + 9y = 8 x − 4y = –18

1 answer:

5 0

Step-by-step explanation:

$x + 9y = - 18 \\ 8x - 4y = - 18 \\ x = - 18 - 9y \\ 8( - 18 - 9y) - 4y = - 18 \\ - 144 - 72y - 4y = - 18 \\ - 76y = 126 \\ y = - 1.66 \\$

$x = - 18 - 9y \\ x = - 18 - 9( - 1.66) \\ x = - 18 + 14.94 \\ x = - 3.06$

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maks197457 [2]

Answer: 112°

Step-by-step explanation:

a straight line only has 180° at all times so it is a matter of subtraction. 180-68 is 112° so from there you can find #2 as 68°, #3 as 90° and #4 as 90°, and so on.

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3 years ago

4 (x+2)=2 (x+3)+2 (x-1) answer?

vekshin1

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