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3 years ago

Can someone explain to me what b means? im confused

Mathematics

1 answer:

vovangra [49]3 years ago

3 0

Answer:

This is a personal reflection of your own thoughts and feelings

example its accurate yes because you have good things to do and say about yourself and to help yourself.

example its not accurate because there are circumstances that may get in the way or bring you down too often. But to compensate that you can try to listen more.

Another example

example it is accurate because i have thought of 4 major things about why health is this level and have accounted for the mind and body elements as well as my own awareness to comparison and reflection in what i strive or to what is should strive to be.

example it is not accurate because in such comparison of mind and body and comparison i sometimes still find i could be so much more happier or healthier or more self aware etc or listen more to myself or others etc.. .

Another example

example it is accurate because i have interest in this part of my health and am self aware to my own interests and find time for them at all costs.

example it is not accurate as im still learning how to be self aware, and can only think of what is good health right now in certain circumstances.

An example of certain circumstances may be when you are around your best friends and not in all new friend circumstances as you need more interests to give confidence maybe and if this is not why then try to pin point what holds you back in personal development.

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I need help please, i don't understand this

kompoz [17]

Answer:

X= 2

Step-by-step explanation:

5x2=10

35 + 10 =45 which is the degree of the angle

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3 years ago

Is the discriminant positive negative or zero?

vitfil [10]

Answer:

Sorry the picture is blocked on my chromebook but i hope this helps

Step-by-step explanation:

A positive discriminant indicates that the quadratic has two distinct real number solutions. A discriminant of zero indicates that the quadratic has a repeated real number solution. A negative discriminant indicates that neither of the solutions are real numbers.

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4 years ago

A 140 kg camera is suspended by two wires over a 40 metre wide football field to get shots of the action from above. At one poin

Katen [24]

Answer:

Please red the answer below

Step-by-step explanation:

In order to determine the length of each cable you use the Newton second law for each component of the forces involved in the situation.

For the x component you have:

$T_1cos\theta_1-T_2cos\theta_2=0$ (1)

T1: tension of the first cable = 1500N

T2: tension of the second cable = 800N

θ1: angle between the horizontal and the first cable

θ2: angle between the horizontal and the first cable

For the y component you have:

$T_1sin\theta_1+T_2sin\theta_2-W=0$ (2)

W: weight of the camera = Mg = (140kg)(9.8m/s^2) = 1372N

You can squared both equations (1) and (2) and the sum the two equations:

$T_1^2cos^2\theta_1=T_2^2cos^2\theta_2\\\\T_1^2sin^2\theta_1=T_2^2sin^2\theta_2-2WT_2sin\theta_2+W^2$

Then, you sum the equations:

$T_1^2(cos^2\theta_1+sin^2\theta_1)=T_2^2(sin^2\theta_2+cos^2\theta_2)-2Wsin\theta_2+W^2$ (3)

Next, you use the following identity:

$sin^2\theta+cos^2\theta=1$

and you obtain in the equation (3):

$T_1^2=T_2^2-2WT_2sin\theta_2+W^2\\\\sin\theta_2=\frac{T_2^2-T_1^2+W^2}{2WT_2}=\frac{(800N)^2-(1500)^2+(1372N)^2}{2(800N)(1372N)}=0.066\\\\\theta_2=sin^{-1}0.066=27.23\°$

With this values you can calculate the value of the another angle, by using the equation (1):

$\theta_1=cos^{-1}(\frac{T_2cos(27.23\°)}{T_1})=cos^{-1}(\frac{(800N)(cos27.23\°)}{1500N})\\\\\theta_1=61.69\°$

Now, you can calculate the length of each cable by using the information about the width of the football field. You use the following trigonometric relation:

$l_1cos\theta_1=40-d\\\\l_2cos\theta_2=d\\\\$