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White raven [17]

4 years ago

13

The sum of 8 and -13.

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