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3 years ago

BRIANLIST ANSWER pls help i meant to put science

Mathematics

1 answer:

melisa1 [442]3 years ago

4 0

Answer:

I'd say Yev's description is best because it's the most specific to what it actually is in terms of science, while everyone else's descriptions are more like examples of different types and stages of energy, and where it could be found.

Hope this makes sense to ya :)

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Let A = {x : 2x² + 3x - 2 = 0} and B = {x : x² + 3x - 4 = 0 } find (A U B) × (A Π B)

ivann1987 [24]

Given :

A = {x: 2x² + 3x - 2 = 0 }
B = {x : x² + 3x - 4 = 0 }

To find :

(A U B ) × (A Π B )

Solution :-

The first set is ,

A ={x : 2x² + 3x - 2 = 0}

Solving the Quadratic equation ,

2x² + 3x - 2 = 0
2x² + 4x - x - 2 = 0
2x( x + 2) -1( x + 2 ) = 0
(2x -1) ( x + 2) = 0
x = 0.5 , -2

Hence ,

A ={0.5, -2}

The second set is ,

B ={ x :x² + 3x - 4 = 0 }

Solving the Quadratic equation ,

x² + 3x - 4 = 0
x² + 4x - x - 4 = 0
x( x + 4)-1 ( x +4) = 0
(x + 4) ( x -1) = 0
x = 1 , -4

Hence ,

B ={1,4}

Now ,

A U B = { 0.5 , 1 , 4 , -2}
A Π B = {∅ }

Since AΠ B is a null set , hence ,

A × B = {∅}

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3 years ago

A rectangular boad is 1100 millmeters long and 900 millmeters wide. what is the area of the board in square meters?

Vanyuwa [196]

Answer:

1100 mm = 1.1 m, and 900 mm = 0.9 m.

So the area is 1.1 x 0.9 = 0.99 m^2

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3 years ago

The entires of the first row are

zubka84 [21]

Answer:

The answer is 3, 6.

Step-by-step explanation:

The numbers in the top rows on the left side of the equation is 1, 4 and 2, 2.

1, 4 + 1, 2 = (1 + 2), (4 + 2) = 3, 6

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2 years ago

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The area is 19.5 and the perimeter is 23.1

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3 years ago

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Bumek [7]

Answer:

Step-by-step explanation:

.07x1 is .07, therefore tax rate

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