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kogti [31]
3 years ago
9

Which are solutions to the following equation? x^2=21

Mathematics
1 answer:
creativ13 [48]3 years ago
4 0

Answer:

x

=

±

√

21

Explanation:

To find

x

2

you have to find the square root of

21  x = ± √ 21 ≈ ± 4.5286

Step-by-step explanation:

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blagie [28]

Answer:

The inequality that comes from this equation is -2 < x < 0

Step-by-step explanation:

In order to solve this equation, we need to start by solving for the absolute value portion of the equation.

-5l2x + 2l + 7 > -3

-5l2x + 2l > -10

l2x + 2l < 2

Now we need to split the equation into two different portions. One with the absolute value symbol taken away. Then we do it again with the symbol flipped and the answer negated.

2x + 2 < 2

2x < 0

x < 0

And the negated version.

2x + 2 > -2

2x > -4

x > -2

5 0
3 years ago
ANSWER FOR BRAINILEST.
Lesechka [4]

Answer:

2713

Step-by-step explanation:

The volume of a cylinder is base * height. That means the whole cylinder's volume is 8^2 * 18 * pi = 1152 pi

The volume of a sphere is (4/3)(pi)(r^3) = (4/3)(pi)(6^3) = 288 pi

Cylinder - Sphere = Shaded Volume

1152pi - 288pi = 864pi

Substitute 3.14 for pi, and you get

864(3.14) = 2712.96, which rounds to 2713

6 0
3 years ago
Read 2 more answers
Which angle corresponds to 1/6 of a circle?
Basile [38]
360/6 = 60 degrees.

2pi/6 and pi/3 makes sense.

Out of 1/6 = 60 there's your answer.

Brainliest please!
5 0
3 years ago
Read 2 more answers
Which of the following is a true statement?
Angelina_Jolie [31]

C is the correct answer, -7 is smaller than 7.

8 0
3 years ago
50 POINTS!! EASY!
frosja888 [35]

9514 1404 393

Answer:

  • y = -16
  • x = 10

Step-by-step explanation:

The direct proportion equation is ...

  y = kx

where k is the constant of proportionality. Here, you're told k=-2, so the equation is ...

  y = -2x

For x=8, the value of y is ...

  y = -2(8) = -16 . . . . . do the multiplication

For y = -20, the value of x is ...

  -20 = -2x

  10 = x . . . . . . . . . divide both sides by -2

3 0
3 years ago
Read 2 more answers
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