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Alchen [17]
3 years ago
13

Solve x2+x-1=0 using the quadratic formula.

Mathematics
1 answer:
weeeeeb [17]3 years ago
6 0

Answer:

x = \frac{-1 ±\sqrt{5} }{2}

Step-by-step explanation:

Ignore the A that doesn't belong in the answer

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Please help me with # 3
sladkih [1.3K]

Answer:

The exterior angles need to equal 360 degrees.

You have 70 + 65 + 75 = 210

So 2x + 3x need to equal 360 - 210 = 150

5x = 150

x = 150 /5 = 30

2x = 2 *30 = 60

3x = x *30 = 90

An interior angle and an exterior angle need to equal 180 degrees.

The largest interior angle would need to correspond with the smallest exterior angle.

The smallest exterior angle is 2x which equals 60 degrees.

The largest interior angle would be 180 - 60 = 120 degrees.

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3 years ago
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grin007 [14]

Answer:

distance = \sqrt{(x_{1} -x_{2})^2+(y_{1} -y_{2})^2  }\\\\

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3 years ago
Choose the correct simplification of (7x3y3)2.<br><br> 14x6y6<br> 49x5y5<br> 49x6y6<br> 14x5y5
dolphi86 [110]
The answer would be the first one.

I find it easier to expand the equation (you still get the same answer).

= 2 * 7x + 2 * 3y + 2 * 3
= 14x + 6y + 6

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3 years ago
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What is the least common multiple (LCM) of 7 and 8? will give brainlest if answered in 1 minute
attashe74 [19]

Answer:

56.

Step-by-step explanation:

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3 years ago
If EFG ≅ △ ABD<br> so FG is<br> = .......?<br> help asap
Igoryamba

Answer:

FG=BD

Step-by-step explanation:

hope this helps!!

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2 years ago
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