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3 years ago

What is - 4 - ( - 2 ) evaluated

Mathematics

2 answers:

jeyben [28]3 years ago

8 0

-4 - (-2)

when subtracting a negative number, the subtraction sign and 2nd negative sign are turned into an addition sign;

-4 + 2 = -2

Volgvan3 years ago

6 0

-4 - ( - 2 ) = -2

-4 + 2 =-2

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The floor of hexagonal barn has a perimeter 1260

MArishka [77]

Answer: 5040

Step-by-step explanation: There are 4 sides which is equal to 1260, 1260 x 4 = 5040

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2 years ago

Suppose you are putting up a tent for a camping trip.

SSSSS [86.1K]

The length of the rope needed is 15 feet

Given the following parameters;

Height of the pole = 9 foot

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Required

Length of the rope.

To get the length of the rope, you will use the pythagoras theorem expressed as:

c² = a² + b²

Substituting the given parameters:

c² = 9² + 12²

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Learn more on Pythagoras theorem here: brainly.com/question/231802

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2 years ago

Explain how you can approximate a cube root when the cube is not a perfect cube.

jenyasd209 [6]

Answer:

See below.

Step-by-step explanation:

It would take a long time to explain . There is a good method called Newton's method which involves graphs of the type

y = x^3 - n and applying calculus to produce cycles of approximation until you'll get close to the required cubic root.

You'll find it on online videos.

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3 years ago

Read 2 more answers

How many 5-digit numbers can be formed from the integers 1, 2, ... , 9 if no digit can appear more than twice?

elena-14-01-66 [18.8K]

5 digit number with no repeats
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2nd digit has 8 possibilities
3rd digit has 7 possibilities
4th digit has 6 possibilities
5th fight has 5 possibilities
Therefore the answer is:
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3 years ago

Which statements about the hyperbola are true? Check all that apply. A. There is a focus at (0,−10). B. There is a focus at (0,

hichkok12 [17]

Answer:

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Assume the hyperbola is like the one below.

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The vertices of your parabola are (0,±8) so a = 8.

The covertices are (±6,0), so b = 6.

Calculate c

$\begin{array}{rcl}a^{2} + b^{2} & = & c^{2}\\8^{2} + 6^{2} & = & c^{2}\\64 + 36 & = & c^{2}\\100 & = & c^{2}\\c & = & \mathbf{10}\\\end{array}$

A. Foci

The foci are at (0, ±c) = (0, ±10)

TRUE. There is a focus at (0,-10).

B. Foci

The foci are at (0,±10).

False. There is no focus at (0,12)

C. and D. Asymptotes

The equations for the asymptotes are

$y = \pm\dfrac{a}{b}x = \pm\dfrac{8}{6}x = \pm\dfrac{4}{3}x$

So, y = ±x are not asymptotes.

False.

E. and F. Directrices

The equations of the directrices are

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y = 6.4 is a directrix.

E is false. x = cannot be a directrix

F is uncertain. Your equation for the directrix is incomplete.

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3 years ago