3 years ago

20 POINTS

Mathematics

1 answer:

quester [9]3 years ago

4 0

Answer:

Step-by-step explanation:

7 * 2 is 14 + 6 is equal to 20. That is the only possible answer.

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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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2 years ago

Can you please tell me asp

Lera25 [3.4K]

Answer:

i think 8

Step-by-step explanation:

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2 years ago

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Every week, Mr. Kirkson uses 3 1/6 gallon of water to water every 1/3 square foot of his garden. How many gallons of water does

nata0808 [166]

3 1/6 / 1/3 =

19/6 / 1/3 =

19/6 * 3/1 = 57/6 = 9 1/2 gallons per square foot

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2 years ago

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Peri spent 40% of her money on books and 50% of the rest on toys. She has $21. How much money did she have first.

Vlad1618 [11]

40/100 + 50/100 = 90/100

il lui reste 10/100 ou 21 $

10 % = 21 $
100 % = 210 $

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3 years ago

Which of the following expressions is not equivalent to 2(b+8)?

maksim [4K]

the awser is (-2)(8 + 6) + (-3)

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2 years ago