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3 years ago

EVALUATE SQUARE ROOTS asap

Mathematics

1 answer:

Kamila [148]3 years ago

8 0

1.
√(16+20)=√36=6
C

2.
√(21-9)=√(12)=(√4)(√3)=2√3
B

3. 2*√3=2*1.73205=3.464
B

1.C
2.B
3.B

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2 years ago

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weqwewe [10]

Answer:

x = 1

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Step-by-step explanation:

System of equations:

6x - 2y + z = -2

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Isolate one variable in any of the equations:

x + 6y = 31

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Plug in this value for x in another equation:

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186 - 36y - 2y + z = -2

186 - 38y + z = -2

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z = -188 + 38y

Plug in these values in the remaining equation:

2(31 - 6y) + 3y - 3(-188 + 38y) = 11

62 - 12y + 3y + 564 - 114y = 11

626 - 12y + 3y - 114y = 11

626 - 9y - 114y = 11

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x = 31 - 30

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Check your work:

6x - 2y + z = -2

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-4 + 2 = -2

-2 = -2

Correct!

*Note there are several ways to solve for these types of problems. I used substitution*

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