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ki77a [65]
2 years ago
11

140 for 21 minutes how much for 18.minutes

Mathematics
1 answer:
statuscvo [17]2 years ago
3 0
In 18 minutes its 120 because you find the unit
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Which relationships have the same constant of proportionality between Y and as the equation Y=5/2 X
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A and B

Step-by-step explanation:

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Triangle A C B is cut by line segment E D. Line segment E D goes from side B C to side A C. The length of B A is 4 x minus 6 and
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D

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2 years ago
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What is one of the solutions to the following system of equations?
Amanda [17]

Answer:

(8,-1)

Step-by-step explanation:

Given :   x^{2} +y^{2} =65

               x+y=7

To Find: solution of given system of equations.

Solution:

Equation a :   x^{2} +y^{2} =65

Equation b :  x+y=7

Substitute the value of y from equation b in equation a

y from equation b : y = 7-x

Now substitute value of y in equation a

Thus equation a becomes:

 x^{2} +(7-x)^{2} =65

x^{2} +49+x^{2}-14x =65

2x^{2} -14x =65-49

x^{2} -7x -8=0

x^{2} -8x+x -8=0

x(x-8)+1(x-8)=0

(x+1)(x-8)=0

⇒ x= -1 and x = 8

Now substitute values of x  in equation b to obtains values of y

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for x = -1

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⇒ y=7+1

⇒ y=8

Thus (x,y)=(-1,8)

For x =8

⇒ 8+y=7

⇒ y=7-8

⇒ y=-1

Thus (x,y)=(8,-1)

Hence Option A is the correct solution .


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3 years ago
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What is the role of public authority in society? Is it to demand obedience from citizens? Is it to protect?
marin [14]

Answer:

Having public authority in society is there to protect our rights, such as life liberty, and property. They are there to help keep things safe. Public authority is not to demand obedience from citizens it is there to protect them from any harm.

Step-by-step explanation:

4 0
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