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nirvana33 [79]
3 years ago
11

Which ones do not represent a function and which ones do represent a function and why?​

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
3 0

7 is not because a couple x values were repeated

8 is not because the x value -2 was used for two y values

9 is not because a couple x values were used for more than one y value

10 is a function is x alue is only used once

hope this helps :)

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In the early months of some​ year, one site added 0.2 million new accounts every day. at this​ rate, how many days would be need
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50 days needed for 10 million new account
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3 years ago
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The equation h=7sin(pi/21t)+28 can be used to model the height, h, in feet of the end of one blade of a windmill turning on an a
satela [25.4K]

Answer:

7 feet is the length of the blade of the windmill.

Step-by-step explanation:

We have the equation

h = 7 sin(pi/21t) + 28 ------ eq1

At time 't' = 0, the end of the blade is pointing to the right parallel to the ground meaning it is at the same height as the other end. (Ф = 0°)

So, by calculating the maximum height of this end at  Ф = 90°. we can calculate the length of the blade.

Now, we know that a general model equation of a circular simple harmonic motion is represented as :     y = A sinωt + k ----- eq2

Where A is the amplitude that is, maximum displacement from mean to maximum position.

ω is the angular frequency.

Comparing eq1 and eq2:

A = 7

so the difference in blades end height at Ф = 0° and Ф = 90° is 7 feet.

Hence, the length of the blade is 7 feet.

4 0
3 years ago
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The sides of a square are 2 4/9 inches long. What is the area of the square?
Law Incorporation [45]
<span>2 4/9 = 22/9

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hope that helps</span>
5 0
3 years ago
Solve the system by the substitution method.<br> x-2y = -2<br> y = - 3x + 8
aliina [53]

x-2y = -2

x-2(-3x+8)=-2

mutiply the bracket by -2

(-2)(-3x)=6x

(-2)(8)=-16

x+6x-16=-2

7x-16=-2

move -16 to the other side

sign changes from -16 to +16

7x-16+16=-2+16

7x= -2+16

7x= 14

divide both sides by 7

7x/7=14/7

x=2

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y=-3x+8

y=-3(2)+8

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6 0
3 years ago
HELP ASAP
Alex787 [66]

<span>v(x)=(s/t)
= (3x - 6) / (-3x+6)
= [3(x-2)] / [-3(x-2)] --> 3 is factored out
= 1/-1 </span>---> common terms are cancelled out. 
= -1 ---> This is the simplified formula.

To find the domain, we equate the denominator to 0.
-3x+6 = 0
3x = 6
x = 2
Domain: all values except 2.

w(x)=(t/s)(x)
= (-3x+6)x / (3x-6)
= [-3x(x-2)] / [3(x-2)] --> 3 is factored out
= -x --> The common terms are cancelled out. This is the simplified formula.

Solving for domain:
3x-6 = 0
3x = 6
x = 2
Domain: all values except 2.

4 0
3 years ago
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