Gọi A là biến cố học giỏi mon toán, B là biến cố học giỏi môn văn. Biến cố của biến cố A+B có nghĩa là

Answers

Answer 1
What do you need help with

Related Questions

A person had $17,000 invested in to accounts One paying 7% simple interest And one paying 8% simple interest. How much was invested In each account if the interest rate after one year is $1356?

Answers

Answer:

A1 7% = $400 & A2 8% = $16,600

Step-by-step explanation:

A1 * 7% + A2 * 8% = 1356

A1 + A2 = 17000

A1 = 17000 - A2

(17000 - A2) * 0.07 + A2 * 0.08 = 1356

1190 - 0.07 A2 + 0.08 A2 = 1356

1190 + 0.01 A2 = 1356

0.01 A2 = 166

A2 = 16600

A1 = 17000 - A2

A1 = 17000 - 16600

A1 = 400

Kolyan buys water for $2.60. He also buys biscuits The ratio cost of biscuits: cost of water= 3:2 Find the cost of the biscuits.

Answers

Answer:

1.733

Step-by-step explanation:

Given ratio ,

=> 3:2

According to the Question ,

=> $ 2.60 / x = 3/2

=> x = $ 2.60 × 2/3

=> x = $ 1.733

Answer:

≈ $1.73

Step-by-step explanation:

[tex]\frac{2.6}{y} :\frac{3}{2}[/tex]

y × 3 = 2 × 2.6

3y = 5.2

3y ÷ 3 = 5.2 ÷ 3

[tex]y=1\frac{11}{15}[/tex]

y = 1.7333333333333

1.7333333333333 rounds to $1.73

What is the slope of the line described by the equation below?
y=-x+ 8
O A. -8
O B. -1
O C. 8
O D. 1

Answers

Answer:

-1

Step-by-step explanation:

See Image below:)

Answer:

-1

Step-by-step explanation:

What is the range of the data?

Answers

R: {12,13,14,15,16,17,18,19,20}

hope this helped !!

Evaluate: (g + ƒ)(2)

Answers

From the graph,

g(2) = 4 ( from the coordinate (2,4))

[ The green line represent the function g(x)]

f(2)= 0

[ The red line represent the function f(x)]

(g + ƒ)(2) = g(2)+f(2) = 4+0 = 4

OPTION A is the correct answer

Jane Peterson has taken Amtrak to travel from New York to Washington, DC, on six occasions, of which three times the train was late. Therefore, Jane tells her friends that the probability that this train will arrive on time is 0.50. Would you label this probability as empirical or classical? Why would this probability not be accurate?

Answers

Answer:

a) This probability as empirical Probability.

b) This probability is not accurate because this experiment must be repeated a large number of times for empirical probabilities should be accurate.

Step-by-step explanation:

On 6 occasions, of which three times the train was late. that means 3 times the train is on time.

Empirical probability = Number of outcomes satisfying event / No.of trails

                                = 3/6 = 0.5.

a) This probability as empirical Probability.

b) This probability is not accurate because this experiment should be repeated a large number of times for empirical probabilities should be accurate.

Which one hurry
A.50
B.80
C.90
D.100

Answers

Answer:

I think its

im not sure

Step-by-step explanation:

i need y’all to help me asap!!!!!!

Answers

Answer:

-1

Step-by-step explanation:

f(0) = -5^0 = -1

I need to solve for X Y and Z please and thank you

Answers

9514 1404 393

Answer:

x = 5y = 30z = 8

Step-by-step explanation:

The rhombus has several relevant properties.

The sides are all the same lengthDiagonals are perpendicular bisectors of each otherDiagonals divide the rhombus into congruent triangles

The last of these relations can be used to find x:

  7x° = 35°

  x = 35°/7° = 5

The second of the relations can be used to find y:

  3y° = 90°

  y = 90°/3° = 30

The first of the relations can be used to find z:

  10z -8 = 5z +32

  5z = 40 . . . . . . . . . add 8-5z

  z = 40/5 = 8

Which function has the same y-intercept as the function
Y=2/3x-3?

Answers

Answer:  6x - 7y = 21

Step-by-step explanation:

sorry if its wrong

I believe she is right I think it is 6x -7y=21 too!

(5 QUESTION 4 If 1 foot = 0.37 metres and 1 mile - 5.180 feet. Find the number of kilometres in 15 miles.​

Answers

Answer:

there are 24.14 kilometers in 15 miles

PLEASE HELP, AND HOW DO U SOLVE THESE TYPE OF QUESTIONS

Answers

9514 1404 393

Answer:

  625

Step-by-step explanation:

The ordered pair is an (x, y) pair. You are given the value of x. Put it in the equation and do the arithmetic.

  y = 5^4 = 625

The ordered pair is (4, 625). The missing value is 625.

_____

Additional comment

The exponentiation function on many calculators is done using a key labeled ...

  [tex]\boxed{y^x}[/tex]

You can do it the long way by recognizing that 5^4 = 5·5·5·5 or 25·25.

I need the answer. Plzzzzzz

Answers

The answer is J, look at the numbers and compare it to the graph

Answer:

J

because there is only one number in between 10-19 which is 18. One number in between 20-29 which is 26. 2 numbers in between 40-49 which is 46 and 47. 3 numbers in between 50-59 which is 53, 54, 59. and 1 number in between 70-79 which is 75

Step-by-step explanation:

Brainly?

What’s the slope and equation

Answers

Y=-10x-100

Rise over run

Answer:

slope = -5 equation= y=-5x+100

Step-by-step explanation:

pick the x and y intercepts as your points to find the gradient that is

(20,0) and (0,100)

slope =∆y/∆x

=100/-20

= -5

take point(20,0) and (x,y) to find equation using the slope

equation becomes y= -5x+100

Choose (two) statements (the original conditional statement and converse)
that could form the biconditional "An object measures 12 inches if and only if it is 1 foot long."

A. If an object is 1 foot long, then it measures 12 inches.
B. If an object does not measure 12 inches, then it is not 1 foot long.
C. An object is not 1 foot long if it does not measure 12 inches.
D. If an object measures 12 inches, then it is 1 foot long.

PLEASE HELP !!

Answers

Wait ⟟ don’t understand sos ⟟ can’t help on this one

Answer:

Ssss

Step-by-step explanation:

What are the eight-digit grid
coordinates for benchmark 86 (circled
in red)?

Answers

Answer:

might wanna add the picture for an answer

Step-by-step explanation:

Thanks!!

A set of eight cards contains one joker. Player A chooses 5 cards at random,
Player B takes the remaining three cards. What is the probability that Player A has the joker?
Player A discards 4 cards and Player B discards two cards. It is known that the joker has not been discarded, what is the probability that Player A has the joker?

Answers

Answer:

56%

Step-by-step explanation:

because of the 56% it had to be true to be in the question at all.

What is the quotient?
x-3) 4x2+3x+2
+2
O 4X2 + 15 +
47
X-3
43
0 4x + 15 +
X-3
O 4x2 + 15 +
43
X-3
0 4x + 15 +
47
X-3

Answers

Answer:

13

Step-by-step explanation:

the answer is 13

the answer is 13

the answer is 13

the answer is 13

the answer is 13

The quotient obtained by dividing 4x²+3x+2 will be 4x + 15 hence option (A) will be correct.

What is the equation?

An equation can be defined in numerous ways. Algebraically speaking, an equation is a statement that shows the equality of two mathematical expressions.

A formula known as an equation uses the same sign to denote the equality of two expressions.

In another word, the equation must be constrained with some constraint.

Given that

dividend  =  4x²+3x+2

divider = x -3

⇒ (x - 3) / 4x²+3x+2

⇒ (x - 3) / 4x²+3x+2

→ First it will goes for 4x time so 4x × (x - 3) = 4x² - 12x

Quotient = 4x

so (4x²+3x+2) - (  4x² - 12x ) = 15x + 2

(x - 3) / 4x²+3x+2

→ Second time it goes for 15 so 15 × (x - 3) = 15x -45

Quotient = 15

so  (15x + 2 ) - (  15x -45 ) = 47

Hence, 47 will be the remainder and the quotient will be (4x + 15).

For more about the equation, here:

brainly.com/question/10413253

#SPJ2

If four pounds of potatoes cost $6.00, how much would 10 pounds of potatoes cost

Answers

Answer:

I think is 15 dollars.

Step-by-step explanation:

each pound cost 1.5 multiply it by 10

Answer:

$15

Step-by-step explanation:

4 pounds are $6

10pounds are $?

1 pound would be $1.5, because 6/4 = 3/2= 1.5

If one pound is 1.5 dollars, 10 pounds would be 10*1.5=$15

Factor the expression completely. 28x2 + 20​

Answers

Answer:76

Step-by-step explanation:

Jenny is taking a vacation from Florida. She travels 70 kilometers per hour for 2 hours, and 63 kilometers per hour for 5 hours. Over the 7 hours time period what was Jenny's average speed?​

Answers

Answer: 65 kmh

Step-by-step explanation:

70 kmh for 2 hours = 140 km.

63 kmh for 5 hours = 315 km

140 + 315 = 455/7 total hours = 65 kmh

[tex]\frac{1+siny}{cos y}+\frac{cos y}{1+sin y}[/tex]

[tex]\frac{cot x}{tanx+cot x}=cos^2x[/tex]

csc^2θ·tan^2θ - 1 = tan^2θ

Answers

Step-by-step explanation:

a)

[tex] \frac{1 + \sin y}{ \cos y} + \frac{ \cos y}{1 + \sin y} = \frac{1 + 2 \sin y + \sin^{2} y + \cos ^{2} y}{ \cos y(1 + \sin y)} [/tex]

[tex] = \frac{2 + 2 \sin y}{ \cos y (1+ \sin y)} = \frac{2}{ \cos y} = 2 \sec y[/tex]

b)

[tex] \frac{ \cot x}{ \tan x + \cot x} = \frac{ \cos x}{ \sin x( \frac{ \sin x}{ \cos x} + \frac{ \cos x}{ \sin x} )} [/tex]

[tex] = \frac{ \cos x}{ \frac{ \sin^{2} }{ \cos x} + \cos x } = \frac{ \cos x}{ \frac{ \sin ^{2} x + \cos^{2} x}{ \cos x} } [/tex]

[tex] = \cos ^{2} x[/tex]

c) Note that cscx = 1/sinx so

[tex] \csc^{2} \theta \tan^{2} \theta - 1= \frac{1}{ \cos^{2} \theta } - 1[/tex]

[tex] = \frac{1 - \cos^{2} \theta }{ \cos \theta} = \frac{ \sin^{2} \theta}{ \cos ^{2} \theta } = \tan^{2} \theta[/tex]

How many x-intercepts does the graph of y=2x^2-4x+2 have?
A.) 2
B.)1
c.)0

Answers

Answer:

2

Step-by-step explanation:

Help me please also with this one please

Answers

Answer:

3x+60+60=180 (cointerior angle)

3x+120=180

3x=180-120

3x=60

x=20

Plzzz help I only have 20 minutes

Answers

Answer:

n+6+2n+3+90=180

3n+99=180

3n=81

n=27

33 plus 90+57=180

Answer:

the value of n is 27 degree

Step-by-step explanation:

n+6+2n+3+90=180 degree (being linear pair)

3n+9+90=180

3n=180-99

3n=81

n=81/3

n=27

A linear pair is a pair of adjacent angles formed when two lines intersect.

Use the following data and graph the best-fit quadratic curve. What is a good approximation for the value of c?


2
1
3
-2

Answers

Answer:

3=a(-3-(-2))^2+2

Step-by-step explanation:

Answer:

3=a(-3-(-2))^2+2

Step-by-step explanation:

PLEASE HELP
Solve for x: -7 06 0-6 >x>9
06 >x>-9
O-6 Question 9 Multiple Choice Worth 1 points)

Answers

Answer:

0-7

Step-by-step explanation:

89-0

Help meeeeeeeeeeeeeeeeeeeeee

Answers

Step-by-step explanation:

the answer is in the above image

use the app

WOLFRAM ALPHA it helps a lot

Answer:

[tex] \frac{1}{ 2^{1} } + \frac{1}{ {3}^{2} } + \frac{1}{ {4}^{3} } + \frac{1}{ {5}^{4} } + ... \\ \frac{1}{2} + \frac{1}{9} + \frac{1}{64} + \frac{1}{625} + ... \\ = \frac{226201}{360000} \\ = 0.6283..[/tex]

HELP ME PLEASE Urgently !!!!

Answers

Answer:

The best bet would be x=40

Step-by-step explanation:

If the zeros of a quadratic function are 3 and 8, what are the factors of the function

Answers

.....................................

Answer:

( x-3) (x-8)

Step-by-step explanation:

the zeros of a quadratic are the roots of the equation so you could factor as (x-root 1)(x-root2) = ( x-3) (x-8)

(x-3) and (x-8) are the factors

Other Questions
Which statements describe organic compounds 8x - (2x - 13) = 42solve and check the equation Remove parentheses by applying the Distrubitive Property. 5x^2(7- x^2) What is the equation of the line that passes through the points (1, -3) and (3, 5)? Write the equation in standard form AND using function notation. Alex wants to arrange chairs in such a way that the number of chairs in a row is equal to the number of the columns.He has ordered 5100 tables. a)How many more tables needed to arrange in such a way that he planned? Justify your answerb)How many chairs can he remove to arrange in a way that he wants? Justify your answer. Which product is positive?(1) (1943)-3)(13)04-1)-4)O53 Find the value of x. increase 80 in the ratio 3:2 how what is one major role international orginizations play in the global economy? Need help pls. Kind of struggling to get an answer From what you can see about the shape of HIV, explain what the problem would be with a vaccine to HIV? what are the dangers of social insecurity Anna needed to let everyone in the music club know the time of its next meeting. She called two people and asked each of them to call two other people, and so on. if it takes one minute to call two people, how many phone calls were made during the fifth minute? 1hr left on this test so confused Which statement is true regarding the functions on thegraph?Of(-3) = g(-4)Of(-4)= (-3)f(-3) = g(-3)f(-4) = g(-4) Does it have a solution? If the total surface area of hemispher is 7392 square cm. Them find its radius. The Impact of The Civil War: Drag the tiles to the correct boxes to complete the pairs. Match each cause with the correct effect during the Civil War.Need help as soon as possible! Thanks, everyone! Which of the following best describes the importance of the phase of mitosis shown in cell 1? If Earth didn't rotate, what would be one major obstacle life would have toovercome? The amount of radium 226 remaining in a sample that originally contained A grams is approximately C(t) = A(0.999 567)t. Where t is time in years find the half-life to the nearest 100 years