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4 years ago

120 divided (2-4) exponent 2 plus 2*3

Mathematics

1 answer:

Murljashka [212]4 years ago

7 0

120/(2-4)^2+2*3=36

You have to use bedmas or the order of operations

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Find the m∠1, if p|| q, and m∠4 = 125 degrees. m∠1 =

polet [3.4K]

Step-by-step explanation:

m<5=180-m<4 (linear pair)

m<5=180-125 = 55°

m<5=m<1 ( alternate angle)

therefore, m<1 = 55°.

hope this helps you.

8 0

3 years ago

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a student needs three pieces of wire for a part project the second piece must be four times as long as the first the third piece

ollegr [7]

First piece is x
second piece is y. y=4x
third piece is z. z=3y=12x

x+y+z=680
x+4x+12x=680
17x=680. x=40cm y=160cm. z=480cm

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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:

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

d: distance to the right side of the field

By using the cosine law you can fins a system of equation and then you can calculate the values of l1 and l2.

3 0

3 years ago

Look at the pic attached please :D

dangina [55]

The answer i got is 19.4..............

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3 years ago

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Find the surface area of a square pyramid. round yo ur answer to the nearest hundredth

Aleonysh [2.5K]

Answer:

A=a^2+2a√(a2/4+h^2)

Step-by-step explanation:

a Base edge

h Height

Since there are no values you'll need to put them in yourself.

5 0

3 years ago