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White raven [17]
4 years ago
13

The sum of 8 and -13.

Mathematics
2 answers:
Anna35 [415]4 years ago
7 0

Answer:

The answer is -5

Step-by-step explanation:

DIA [1.3K]4 years ago
5 0

Answer:

-104 is the answer .....

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Sita and rita make remarks on question 4a b c sita says she can only make one equation which satisfies the given cindition rita
Otrada [13]

Answer: I agree with Sita.

Step-by-step explanation:

An infinite number is a very big number which is impossible to physically achieve. I agree with Sita because when Rita is forming equations on and on to an extent of not knowing when to stop. That is when she can say to infinite. And I don't think this is possible.

3 0
3 years ago
Of the 13 people who have taken their seats at a seminar, 5 have red hair. What is the experimental probability that the next pe
trapecia [35]

Answer:

5/13

Step-by-step explanation:

P(red) =  

red

total

=  

5

13

7 0
3 years ago
Read 2 more answers
What is the modulus and argument after (StartRoot 3 EndRoot) (cosine (StartFraction pi Over 18 EndFraction) + I sine (StartFract
fgiga [73]

Answer:

|z| = 27 -- Modulus

\theta = \frac{\pi}{3} --- Argument

Step-by-step explanation:

Given

((\sqrt 3)(cos\frac{\pi}{18} + i\ sin\frac{\pi}{18}))^6

Required

Determine the modulus and the argument

We have that:

z = ((\sqrt 3)(cos\frac{\pi}{18} + i\ sin\frac{\pi}{18}))^6

Expand:

z = (\sqrt 3)^6(cos\frac{\pi}{18} + i\ sin\frac{\pi}{18})^6

z = 27(cos\frac{\pi}{18} + i\ sin\frac{\pi}{18})^6

A complex equation can be expressed as:

z = |z| e^{i\theta}

Where

|z| = modulus

\theta = argument

Where

e^{i\theta} = (cos\frac{\pi}{18} + i\ sin\frac{\pi}{18})

So:

z = 27(cos\frac{\pi}{18} + i\ sin\frac{\pi}{18})^6 becomes

z = 27(e^{i\frac{\pi}{18}})^6

By comparison:

e^{i\theta} = (e^{i\frac{\pi}{18}})^6

This gives:

{i\theta} = i\frac{\pi}{18}}*6

{i\theta} = i\frac{6\pi}{18}}

{i\theta} = i\frac{\pi}{3}}

Divide through by i

\theta = \frac{\pi}{3}

Hence, the modulus, z is:

|z| = 27

And the argument \theta is

\theta = \frac{\pi}{3}

4 0
3 years ago
Derive the equation of the parabola with a focus of (-5,-5) and a directrix of y=7.
adoni [48]

Answer:

y=-\frac{1}{24}(x+5)^2+1

Step-by-step explanation:

The given parabola has its focus at (-5,-5) and the directrix is at: y=7.

The equation of such parabola is given by the formula:

(x-h)^2=-4p(y-k)

The vertex of the parabola is the midpoint of (-5,-5) and (-5,7).

(\frac{-5+-5}{2},\frac{-5+7}{2} )=(-5,1)

The value of p is the distance from the (-5,-5) to (-5,1).

p=|1--5|=6

We substitute the values of the vertex and p into the equation to get;

(x--5)^2=-4(6)(y-1)

(x+5)^2=-24(y-1)

Or

y=-\frac{1}{24}(x+5)^2+1

3 0
3 years ago
Evaluate the promblem. 3x+6+5x=86
Mashcka [7]

Answer:

10 or x=10

Step-by-step explanation:

First we can combine like-terms.

8x+6=86

Then subtract 6 from both sides

8x=80

Divide by 8

x=10

8 0
3 years ago
Read 2 more answers
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