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3 years ago

A number cube is rolled, and a coin is tossed. What is the probability that a four is rolled and the coins comes up tails?

Mathematics

1 answer:

KonstantinChe [14]3 years ago

3 0

The answer is D 1/12.

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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 = {∅}

8 0

3 years ago

The crayola crayon company can make 2400 crayons in 4 minutes.How many crayons can they make in 15 minuttes

scZoUnD [109]

4 x n = 2400 x 15Find the cross products
4n = 36000Multiply
n = 9000Divide both sides by 4

The Crayola crayon company can make 9000 crayons in 15 minutes.

hope this helps :)

6 0

3 years ago

How much is 2/3 cups plus 1 1/4 cups

Schach [20]

Answer:

$1\frac{11}{12}$

Step-by-step explanation:

$\frac{2}{3}+1\frac{1}{4}=\frac{2}{3}+\frac{5}{4}=\frac{8}{12}+\frac{15}{12}=\\ \\=\frac{8+15}{12}=\frac{23}{12}=1\frac{11}{12}$

5 0

3 years ago

Help please.........

Tanya [424]

Answer:

y = 4.5 x

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Help me solve this problem

masya89 [10]

2/5 (-7) 5/2 as you know 2/5 x 5/2 = 1
so 1 x (-7) = -7
so the asnwer is -7

7 0

3 years ago