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valina [46]
3 years ago
13

Select all of the variables that are solutions of x^2 +20=12x

Mathematics
1 answer:
IrinaK [193]3 years ago
4 0

Find all solutions:

x^2 +20=12x\\x^2-12x+20=0\\

use quadratic formula to get the following two solutions:

x_1 = 2\\x_2 = 10


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Answer:

Answer down below!

Step-by-step explanation:

1) 10

2) 4

3) 6

----------------

1 ) we know that perimeter = all the sides combined.

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  • (44 is the given perim.; so therefore if 12x2+10x2=44, 20 is the missing width.

2 ) we know that area = lw.

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3 ) we know that area = lw.

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In the evening, the temperature is 28 degrees. By midnight it has dropped 31 degrees lower. Between midnight and 4 am it goes do
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Answer: 21 degrees

Step-by-step explanation:

In the evening, the temperature is 28 degrees and by midnight it has dropped 31 degrees lower, the temperature by midnight will be:

= 28° - 31°

= -3°

Between midnight and 4 am it goes down 6 more degrees. The temperature by 4am will be:

= -3° - 6°

= -9°

Then, by 9 am, the temperature goes up 30 degrees, the temperature at 9 am will then be:

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Given the sets A = {-4, -1, 3, 5, 9} and B = {-2, -1, 0, 1, 2, 3}, the set AUB (u is upside down) is given by:
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The upside down U is the symbol for the intersection of sets. The intersection of two sets is the set that contains the elements that are common to both sets. Which elements are both in set A and in set B?

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In the complex plane, the rectangular coordinates (x, y) represent a complex number. Which statement explains why polar coordina
bonufazy [111]

Answer:

The correct option is;

r = √(x² + y²)

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Step-by-step explanation:

The rectangular coordinate of a complex number on the complex plane is given as (x, y)

Given that the complex number is represented by a point on the plane, we have;

The distance, r, of the point from the origin, (0, 0) is r = √(x² + y²)

The direction, θ, by which we rotate to be in line with the point on the complex number is given by tan⁻¹(y/x)

7 0
3 years ago
Read 2 more answers
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