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harkovskaia [24]
2 years ago
5

Solve the Quadratic Equation for x

Mathematics
1 answer:
dmitriy555 [2]2 years ago
7 0
Answer:

x = +/- sqrt10 i + 1

Explanation:

Key: +/- is plus-minus

I used complete the square

x^2 - 2x + 11 = 0
x^2 - 2x = -11 -2/2 = (-1)^2 = 1
( x - 1 ) ^2 = -10
x - 1 = +/- sqrt10 i
x = +/- sqrt10 i + 1

Picture for clearer answers v

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Someone please help me !!!
Naya [18.7K]

Answer:

x = 120°

Step-by-step explanation:

The equation is given to you:

The sum of the interior angles can be found using the equation:

Sum = (n - 2)180

Note that:

n = # of sides.

Plug in 6 for n in the equation.

∑ = (6 - 2)180

First, solve for the parenthesis:

∑ = (4)180

Next, multiply:

∑ = 4 * 180

∑ = 720

You are solving for one angle. Note that there are 6 angles. Divide the sum of the angles with 6:

720/6 = 120

120° is your answer.

~

8 0
2 years ago
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A triangle has side lengths of 12 millimeters, 17 millimeters, and 13 millimeters. Is this triangle equilateral?
nordsb [41]
No, this triangle is not equilateral. This triangle is scalene. All three sides are of different lengths, which is why it's scalene. In order to have an equilateral triangle, all three sides need to be the same length. 
7 0
2 years ago
What is the volume of the cylinder below?
Rasek [7]

The answer is D. 36pi units^3

Hope this helps!

The formula for cylinder volume is: pi*r^2*h

6 0
2 years ago
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If sinø= 4/7, what is cosø?
balandron [24]
If sine (theta) = 4/7 then theta is found by:
arc sine (4/7) = theta
theta = 34.85 Degrees
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4 0
2 years ago
Find three consecutive integer whose sum is 117
qwelly [4]
117/3 = 39

39 + 39 + 39 = 177

They must be consecutive.

The integers are 37, 39, and 41.
7 0
3 years ago
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