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3 years ago

10

Cuanto es 15 más 15 multiplicado por 2

1 answer:

DENIUS [597]3 years ago

3 0

Answer:

60

Step-by-step explanation:

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What is the y-value in the second<br> problem?

BabaBlast [244]

Answer:

what is the 2nd problem????

Step-by-step explanation:

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3 years ago

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pochemuha

Answer:

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3 years ago

Verify the identity sin (x + ???? / 2) = cos(x) for all real numbers x by using a graph.

Tamiku [17]

Answer:

See proof and explanation below.

Step-by-step explanation:

First we can proof this analitically first using the following property:

$sin(a+b) = sin(a) cos(b) + sin (b) cos(a)$

If we apply this into our formula we got:

$sin (x + \frac{\pi}{2}) = sin (x) cos(\frac{\pi}{2}) + sin (\frac{\pi}{2}) cos (x)$

And if we simplify we got:

$sin (x + \frac{\pi}{2}) = sin (\frac{\pi}{2}) cos (x)= cos (x)$

And that complete the proof.

If we analyze the graphs sin(x) and cos (x) we see that we have a gap between two graphs of $\pi/2$ as we can see on the figure attached.

When we do the transformation $sin(x +\pi/2)$ we are moving to the left $\pi/2$ units and then would be exactly the cos function.

4 0

3 years ago

Geometry:(<br><br> will give brainist to correct answer:)

Lorico [155]

Given:

End points a line segment are (9,-8) and (-1,-4).

To find:

The equation of perpendicular bisector of given line.

Solution:

Slope of given line is

$m=\dfrac{y_2-y_1}{x_2-x_1}$

$m_1=\dfrac{-4-(-8)}{-1-9}$

$m_1=\dfrac{-4+8}{-10}$

$m_1=\dfrac{4}{-10}$

$m_1=-\dfrac{2}{5}$

Product of slopes of two perpendicular line is -1.

$m_1\times m_2=-1$

$(-\dfrac{2}{5})\times m_2=-1$

$m_2=\dfrac{5}{2}$

So, slope of perpendicular bisector is $\dfrac{5}{2}$ .

Perpendicular bisector passes through the midpoint of given endpoints.

$Midpoint=\left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)$

$Midpoint=\left(\dfrac{9+(-1)}{2},\dfrac{(-8)+(-4)}{2}\right)$

$Midpoint=\left(\dfrac{8}{2},\dfrac{-12}{2}\right)$

$Midpoint=\left(4,-6\right)$

So, perpendicular bisector passes through (4,-6) and having slope $\dfrac{5}{2}$ . The equation of perpendicular bisector is

$y-y_1=m(x-x_1)$

where, m is slope.

$y-(-6)=\dfrac{5}{2}(x-4)$

$y+6=\dfrac{5}{2}(x)+\dfrac{5}{2}(-4)$

$y+6=\dfrac{5}{2}x-10$

$y=\dfrac{5}{2}x-10-6$

$y=\dfrac{5}{2}x-16$

Therefore, the equation of perpendicular bisector is $y=\dfrac{5}{2}x-16$ .

7 0

2 years ago

Whats an expression so that the quotient of a decimal and a whole number is 0.04.

Harman [31]

Answer:

0.04 can be written as $\frac{1}{25}$

Step-by-step explanation:

We have given the the quotient as 0.04

We have to write the expression which gives the quotient as 0.04

We know that 0.04 can be written as $4\times 10^{-2}$

We know that $10^{-2}=\frac{1}{100}$

So $4\times 10^{-2}=\frac{4}{100}=\frac{1}{25}$

So 0.04 as quotient can be written as expression $\frac{1}{25}$ which has same value as 0.04

6 0

3 years ago

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