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Sergeeva-Olga [200]
3 years ago
12

PLEASE HELP!!!!!!

Mathematics
2 answers:
aksik [14]3 years ago
6 0

Answer: the answers are 1.8 and 3.2 seconds. So both B and C.

Step-by-step explanation:

Bad White [126]3 years ago
5 0

Answer:

Option 1 and 3 - 1.3 seconds and 3.2 seconds

Step-by-step explanation:

Given : The equation that models the height above or below equilibrium in inches, h, of a spring over time in seconds, t, is h=-30\cos(\frac{2\pi}{5} t).

To find : At which times will the spring be at a height of 20 in. above equilibrium?        

Solution :

We have given,              

The equation that models the height above or below equilibrium in inches      

h=-30\cos(\frac{2\pi}{5} t)

We have to find at h=20 inches the time of spring.

We show it graphically,

Plot the graph of the model  h=-30\cos(\frac{2\pi}{5} t)

Then, Substitute h=20

The points of their intersections are the solution of the model.

The intersection points are (1.831,20), (3.169,20) and many more.

From the given options,

The time are 1.3 seconds and 3.2 seconds.

Therefore, Option 1 and 3 are correct.    

Refer the attached figure below.  

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Bess [88]

Answer:

Blue and Black

Step-by-step explanation:

hi! i think you're asking which of the 2 teams' points added together equal 100. if so, it would be blue and black because 76 + 24 = 100.

broken down: 70 + 20 = 90, 6 + 4 = 10, 90 + 10 = 100 :)

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6 0
3 years ago
The length of the rectangle is twice its width. Write and solve a system of linear equations to find the length L and width W of
vazorg [7]

Answer:

The length is equal to 12 and the width is equal to 6.

Step-by-step explanation:

In order to find the values here, we start by setting the width equal to x. Now knowing this, we know that the length is twice that long. Therefore, the length would be equal to 2x. Now we can use the perimeter formula to solve the equation.

2L + 2W = P

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Now with the given value for x, we can tell that the width is 6 and then we multiply it by 2 to get the length value (12).

7 0
3 years ago
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Phantasy [73]

Answer:

320

Step-by-step explanation:

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2/3 is exactly the same as 8/12
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Below are the steps to solve an equation:
otez555 [7]

Answer:

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Step-by-step explanation:

|x-5|+2=5

|x-5|=5-2

|x-5|=3

x-5=±3

so x-5=-3 is a correct step.

4 0
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