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Katena32 [7]
4 years ago
9

Study the equation. x² + 6x = - 4

Mathematics
1 answer:
Zinaida [17]4 years ago
5 0

Answer:

x = -3+√5,  -3-√5 (exact roots)

or  x = -0.76, -5.24   to the nearest hundredth.

Step-by-step explanation:

x² + 6x = - 4

Completing the square:

(x + 3)^2 - 9 = -4

(x + 3)^2 = 5

x + 3 = +/-√5

x = - 3 + √5, - 3 - √5

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Is 4 kilograms is egual to 4000mgs
Zigmanuir [339]
No.
So, there are 1000 milligrams in one gram, making the 4000 mgs equal to 4 grams.
There are 1000 grams in one kilogram, so 4 kilograms is equal to 4000 grams.

4000 =/= 4
So, 4 kilograms and 4000 milligrams are not equal.
7 0
4 years ago
Read 2 more answers
A particular sound wave can be graphed using the function y = 1 sin 2x y = 1 sin 2 x . Find the amplitude of the function.
alexira [117]

<u>Answer</u>

1

<u>Explanation</u>

The general equation of a wave is ;

y = a sin(kX+Ф)

Where a represent the amplitude, 360/k represent the period of the wave and Ф represent the phase angle.

∴ In the equation y = 1 sin 2x,

Amplitude = 1

4 0
4 years ago
Every year on November 1, the Stablo family plants a tree. This tradition has happened for generations and the first tree the fam
LenKa [72]

Answer:

Apple- 14 Maple- 154

Step-by-step explanation

Since 11 x n - n is equal to a number that ends in 10, 20 etc. and the number has to be a multiple of 11 for the maple tree, and the difference has to stay the same throughout two all we need to find is 15 x n = a number that is divisable by 10. 15 x 10 = 150 so that's the age of the trees this year, and the difference between the trees is 140 so it corresponds with our rule. and the multiple of 11 that the difference is 140 is 11 x 14 = 154 and 154 - 11 = 140. Therefore the apple tree is 14 years old and the maple tree is 154 years old.

8 0
3 years ago
Determine if lines AB and CD are parallel, perpendicular, or neither. A(-3,8), B(3,2), C(7,1), D(5,-1)
Allushta [10]

Answer:

Step-by-step explanation:

The slope of line AB is

\frac{2-8}{3-(-3)} = \frac{-6}{6} = -1

The slope of line CD is

\frac{-1-1}{5-7} = \frac{-2}{-2} = 1

Since the slopes multiply to -1, these lines are perpendicular to one another.

8 0
3 years ago
Help me on this please
gtnhenbr [62]
More than happy to help!

6/3= 2

When you divide powers, you subtract them.

7-4= 3



The answer is:

2*10^3

I hope this helped you! 

Brainliest answer is always appreciated!
7 0
3 years ago
Read 2 more answers
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