Determine the solution for x^2+2x+8

Mathematics

1 answer:

irakobra [83]3 years ago

6 0

Answer:

$x=-1-i\sqrt{7}$ , $-1+i\sqrt{7}$

Step-by-step explanation:

$x=\frac{-b+\sqrt{b^2-4ac} }{2a}$

$x=\frac{-b-\sqrt{b^2-4ac} }{2a}$

Here a=1, b=2 and c=8

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3 years ago

Using the following diagram below, please answer the following:

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The radius of the circle is 15 cm,
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The radius is given in the diagram as half the circle, which is 15 cm.

The diameter is double the radius because the diameter measures the circle from edge to edge, so 15•2=30 cm.

The circumference of the circle is 2•3.14•r=C,
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docker41 [41]

Answer:

1. 18.85in

4. 25.13m

Step-by-step explanation:

I got you

So to find the circumference of any circle we use the equation 2pi(r)

2(3.1415)(3)= 18.85in for the first one because radius is half of the diameter which is 6 so half of 6 is 3

For 4. 4m is actually the radius so just plug that into the equation 2pi(4)=25.13m