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vampirchik [111]

4 years ago

8

Can someone explain to me how to do this

2 answers:

soldier1979 [14.2K]4 years ago

8 0

60+60+60=180
180/60=30
x=30

Otrada [13]4 years ago

3 0

Angles on a straight line add up to 180°, so:

x + 60 = 180

x = 180 - 60

x = 120°

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21x + 7y = 14 <br> -7y = 10 - 3x <br> btw its Elimination!

patriot [66]

$\displaystyle\\\left \{ {{21x+7y=14} \atop {-7y=10-3x}} \right. \\\left \{ {{21x+7y=14} \atop {3x-7y=10}} \right. \\\\\text{We add 2 equations to remove y}\\21x+3x+7y+(-7y)=14+10\\24x=24=>x=1\\\text{We found x, now we can find y. Let's put x=1 into 1st equation}\\21\times1+7y=14\\7y=-7\\y=-1$

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3 years ago

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11111nata11111 [884]

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Step-by-step explanation:

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3 years ago

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kow [346]

Answer:

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Step-by-step explanation:

the sin of an acute angle in a right triangle is the ratio of the opposite side to the hypotenuse

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7 0

3 years ago

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slamgirl [31]

Answer:

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Step-by-step explanation:

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Steps:

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