there are 3 black marbles in and 4 red marbles in a bag. what is the probability that you will pick two black marbles put of the bag without replacing the first one?

Answers

Answer 1

[tex] |\Omega|=7\cdot6=42\\
|A|=3\cdot2=6\\\\
P(A)=\dfrac{6}{42}=\dfrac{1}{7}\approx14\% [/tex]


Related Questions

what is the value of 6/x +2x to the second power when x is 3

Answers

Put x = 3 into the expression:

[tex]\dfrac{6}{x}+2x\to\dfrac{6}{3}+2\cdot3=2+6=8[/tex]

What is the decimal equivalent of the fraction?

5/33



A) 0.15⎯⎯⎯⎯

B) 0.15​

C) 0.1⎯⎯5

D) 0.15⎯⎯

Answers

it is A because if you do 5 divided by 33 you get 0.151515 and so on 

The decimal equivalent of the fraction 5/33 is option A. o.15....

What are Fractions?

Fractions are type of numbers which are written in the form p/q, which implies that p parts in a whole of q.

Here p, called the numerator and q, called the denominator, are real numbers.

The given fraction is 5/33.

We have to find the decimal corresponding to the given fraction.

For that divide 5 by 33.

5 is not divisible by 33.

So add 0 and it become 50.

50 = (33 × 1) + 17

And the quotient is 0.1 with remainder 17.

Now 17 is not divisible by 33.

Add 0 and it becomes 170.

170 = (33 × 5) + 5

Quotient becomes 0.15 with remainder 5.

Again the remainder is 5 and add 0 and becomes 50.

It continues.

So the quotient is 0.1515....

Hence the decimal form is 0.(15) repeating.

Learn more about Fractions here :

https://brainly.com/question/548650

#SPJ3

Can somebody help/teach me about this please?


“Suppose the equation h=-16t^2 + 35t models the altitude a football will reach t seconds after it is kicked. IS THE GIVEN VALUE POSSIBLE?”

A: h= 16 ft. B: h= 20ft.

Answers

A. Since we know that [tex]h[/tex] is the altitude a football will reach t seconds after it is kicked, we are going to replace the altitude [tex]h=16[/tex] in our equation and solve for [tex]t[/tex]. If the equation has any positive real solutions, we can conclude that the given value is possible. 

We know from our problem that the given value is [tex]h=16[/tex], so lets replace that value in our equation and solve for [tex]t[/tex]:
[tex]h=-16t^2+35t[/tex]
[tex]16=-16t^2+35t[/tex]
[tex]16t^2-35t+16=0[/tex]
Solving for [tex]t[/tex]:
[tex]t=1.54[/tex] or [tex]t=0.65[/tex]

We can conclude that the given value, h=16, is possible. In fact, the ball reaches that height two times: at [tex]t=0.65[/tex] and [tex]t=1.54[/tex].

B. Just like before, we are going to replace the given value, [tex]h=20[/tex], in our equation [tex]h=-16t^2+35t[/tex], and then, we are going to solve for [tex]t[/tex] to check if the given value is possible. If the equation has any positive real solutions, we can conclude that the given value is possible.
[tex]h=-16t^2+35t[/tex]
[tex]20=-16t^2+35t[/tex]
[tex]16t^2-35t+20=0[/tex]
Solving for [tex]t[/tex]:
[tex]t= \frac{35+i \sqrt{55}}{32} [/tex] or [tex]t= \frac{35-i \sqrt{55}}{32} [/tex]

Since the equation doesn't have any real solutions, we can conclude that the given value, h=20, is not possible.

The given value h=16 ft is possible based on the quadratic equation model provided. By solving the equation h=[tex]-16t^2 + 35t[/tex] and substituting h=16, we find the possible values of t to be approximately 0.52 seconds or 1.48 seconds.

- For each given value of h, set [tex]\( h = -16t^2 + 35t \)[/tex] and solve for t.

- If you obtain real solutions, the given h is possible. If not, it isn't possible.

Checking for h=16:

1. Set h=16 and solve for t:

[tex]\[ 16 = -16t^2 + 35t \][/tex]

2. Rearrange to form a quadratic equation:

[tex]\[ -16t^2 + 35t - 16 = 0 \][/tex]

3. Solve for \( t \) using the quadratic formula:

[tex]\[ t = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \][/tex]

  where a= -16, b=35, c=16.

  - Find the discriminant:

   [tex]\[ b^2 - 4ac = 35^2 - 4 \times (-16) \times (-16) = 1225 - 1024 = 201 \][/tex]

  Since the discriminant is positive, this quadratic has real roots, indicating that h=16 is possible.

Checking for h=20:

1. Set h=20 and solve for t:

[tex]\[ 20 = -16t^2 + 35t \][/tex]

2. Rearrange to form a quadratic equation:

 [tex]\[ -16t^2 + 35t - 20 = 0 \][/tex]

3. Solve for t using the quadratic formula:

 [tex]\[ t = \frac{-35 \pm \sqrt{35^2 - 4 \times (-16) \times (-20)}}{2 \times (-16)} \][/tex]

  - Find the discriminant:

 [tex]\[ 35^2 - 4 \times (-16) \times (-20) = 1225 - 1280 = -55 \][/tex]

  Since the discriminant is negative, this quadratic has no real roots, indicating that h=20 is not possible.

Conclusion:

- The value h=16 is possible.

- The value h=20 is not possible.

How many cubic feet of water can a 18 inch by 19 inch by 36 inch aquarium hold?

Answers

Volume = Length x Width x Height 

Volume = 18 x 19 x 36 = 12312 in³

Answer:  12312 in³
[tex] 0.78^{3}[/tex] ft.

PLEASE HELP, ASAP!

Eumin pays $3.56 for 4 juice boxes.

How much would Eumin pay for 7 juice boxes?

Enter your answer in the box.

Answers

First you find how much one juice box costs,
3.56 / 4 = 0.89
Now since each costs $0.89, you multiply that by 7 
0.89 * 7 = $6.23

$6.23 is your answer

An architect designs a rectangular flower garden such that the width is exactly​ two-thirds of the length. If 220 feet of antique picket fencing are to be used to enclose the​ garden, find the dimensions of the garden.

Answers

The perimeter of this square is 220, so:
2L + 2w = 220
w = 2/3 L
We can input the w:
2(2/3 L) + 2w = 220
10/3L = 220
10L = 660
L = 66
The width is 44
The length is 66

if you have the equation (x+3) squared = 43 when taking the square root of both sides how many solutions will you have

Answers

Two....................................................................

Answer

21.3 i think hope this can help


Rewrite this logarithm as a subtraction of logs

Log11 (29/11)

Answers


[tex] log_{11}( \frac{29}{11} ) \\ = log_{11}(29) - log_{11}(11) \\ \\ as \: log_{11}(11) = 1\\ \\ therefore \: \: it \: becomes \\ \\ =log_{11}(29) - 1[/tex]

Final answer:

To rewrite the given logarithm as a subtraction of logs, use the property that the logarithm of the number resulting from the division of two numbers is the difference between the logarithms of the two numbers.

Explanation:

The given logarithm is log11 (29/11). To rewrite this as a subtraction of logs, we can use the property that the logarithm of the number resulting from the division of two numbers is the difference between the logarithms of the two numbers.

So, log11 (29/11) can be rewritten as log11 (29) - log11 (11).

PLEASE HELP ASAPPPPP

A piece of cardboard has two circles punched out of it.
What is the approximate area of the remaining cardboard? Use 3.14 for pi and round to the nearest whole number.

Answers

Set up an equation to represent the areas of the shapes in the table:

(area of rectangle) - 2(area of circle)

There is a 2 in front of the area of the circle, since there are two identical circles punched out of the rectangle.

First, find the area of the rectangle. The area of the rectangle is given by the following formula:

length * width

You already have your two values for length and width. Plug those values into the formula:

[tex]14 * 18 = 236[/tex]

236 is the area of the rectangle.

Now we'll find the area of the circle.

The diameter of the circle is 2. The radius is one half of the diameter, so the radius is 1.

The area of a circle is found with the following formula:

[tex]A = \pi r^{2}[/tex]

pi is equal to 3.14, so replace the pi symbol with the 3.14. Then, plug your radius into the equation.

[tex](3.14) * 1^{2} = 3.14[/tex]

The area of the circles is 3.14.

Plug your areas into the first equation above.

[tex]236 - 2(3.14) = 236 - 6.28 = 229.72[/tex]

The approximate area of the cardboard is 229.72.
okay so the person who answerd before me is correct they just havent rounded yet so round it to ethier 227 or 246 i went with 246

Write 806000000 in scientific notation

Answers

You move the decimal over to right after the 8
Then when you move the decimal left it means it’s positive so you moved it over 8 times
Answer: 8.06 x 10^8
agree they should get brainliest

whats the answer to this question

Answers

-3(x - 4) < 6 - 3x

Distribute the -3 on the left:

-3x + 12 < 6 - 3x

Add 3x to both sides:

12 < 6

The x's cancel out leaving you a false statement, so there is no solution.

Answer: No solution.

WILL MARK BRAINLIST!!!!

Just need question 1 (i) and 2 (i), (ii)

Answers

2i
y=4-2x and 4x+2y = 5 can be rewritten as:

 y = -2x + 4
2y = -4x + 5

Multiply all 3 terms of the first eq'n by 2:    2y = -4x + 8

Note that 2y = -4x shows up in both equations.  This is enuf info on which to conclude that the 2 lines have the same slope.

It costs $6 to take 1 dog to the dog beach. It costs $1 more for each additional dog.

Answers

If C is the overall cost and x is greater than 1, the equation would look something like this:
C=6+x
If x is equal to 1
C=6
And so?  Please share the directions.

Total cost = $6 + ($1/ each add'l dog) * (number of add'l dogs)

the measures of two complementary angles have a ratio of 2:7 . what is the measure of the smaller angle

Answers

Answer:
The smaller angle is 20 degrees. 

Explanation:
Complementary angles are two angles (or more) whose sum is 90 degrees.

If two angles have a sum of 90 degrees and their ratio is 2:7, we must determine which two numbers when added together would yield this proportion?

60 + 30 = 90 but 60:30 is a 6:3 ratio which simplifies to 2:1.

45 + 45 = 90 but 45:45 is a 1:1 ratio.

50:40 = 90 but 50:40 is a 5:4 ratio.

10 + 80 = 90, but 10:80 is a 1:8 ratio. We're getting closer!

20 + 70 = 90, and 20:70 can be simplified to 2:7 when you divide each number in the ratio their greatest common factor (GCF) of 10.

Therefore, the two complementary angles would be 20° and 70°, the smaller of which would be 20°

2(2x+9)=50 simplifyed

Answers

4x + 18 = 50
4x = 32
x = 8
whichever one XD
Answer is 8
2(2x+9)=50
4x+18=50
4x=32
x=8

Roger pushes a box on a 30° incline. If he applies a force of 60 newtons parallel to the incline and displaces the box 10 meters along the incline, how much work will he do on the box?

Answers

We have to compute first its force before we can get the work done on the box.

Force = m * a
m = 60 newtons
a = cos30 (since Roger applies force parallel to the incline, we will use cosine)
F = 60 * cos30
F = 51.9615... N

Work done = F * d
F = 51.9615... N
d = 10 meters
W = 51.9615... N * 10 meters
W = 519.6152... Joules or 520 J

Roger does 600 joules of work on the box when he applies a force of 60 newtons and displaces the box 10 meters along a 30° incline.

When Roger pushes a box on a 30° incline with a force of 60 newtons and displaces the box 10 meters along the incline, the work done on the box can be calculated.

Work is given by the equation W = F  imes d imes cos(heta), where W is the work, F is the force applied, d is the displacement, and heta is the angle between the force and the direction of displacement. In this case, because the force is applied parallel to the incline and displacement is along the incline, the angle heta is 0°, making cos( heta) equal to 1.

To find the work done by Roger, we calculate it as:
W = 60 N imes 10 m imes cos(0°)
W = 60 N imes 10 m imes 1
W = 600 joules.

Hence, Roger will do 600 joules of work on the box.

How long is each side of a square that has an area of 25 meters?

Answers

The square root of 25 is 5, so each side is 5metres x
A=s*s
[tex]25 = x \times x \\ 25 = {x}^{2} \\ \sqrt{25} = \sqrt{ {x}^{2} } \\ 5 = x[/tex]
Each side is 5m

please help i will be the happiest person alive
100 points and branliest

Answers

Answer:

Q1:   The correct option is:   16

Q2:   The correct options are: [tex]\frac{AB}{DE}=\frac{AC}{DF}[/tex] and [tex]\frac{AC}{DF}=\frac{BC}{EF}[/tex]

Q3:   The correct option is:  [tex]\overline{BC}=12; \overline{EF}=16[/tex]

Step-by-step explanation:

Question 1:

As here  [tex]\triangle RST\sim \triangle MNO[/tex], so the ratio of the corresponding sides will be equal. That means.....

[tex]\frac{RS}{MN}=\frac{RT}{MO}\\ \\ \frac{8}{x}=\frac{6.5}{13}\\ \\ 6.5x=8*13\\ \\ x=\frac{8*13}{6.5}=16[/tex]

So, the length of the side [tex]x[/tex] will be 16.

Question 2:

If two triangles are similar, then the ratio of their corresponding sides should be equal.  So, here the ratios of the corresponding sides are............

[tex]\frac{AB}{DE}=\frac{1}{3} \\ \\ \frac{BC}{EF}=\frac{2}{6}=\frac{1}{3}\\ \\ \frac{AC}{DF}=\frac{2}{7}[/tex]

So we can see that the ratio of side [tex]AC[/tex] and side [tex]DF[/tex] is not equal with the other ratios.

Thus, the proportions that show the triangles are not similar:  [tex]\frac{AB}{DE}=\frac{AC}{DF}[/tex] and [tex]\frac{AC}{DF}=\frac{BC}{EF}[/tex]

Question 3:

Given that,  [tex]\frac{AB}{DE}=\frac{BC}{EF}[/tex]  

The ratio of [tex]AB[/tex] and [tex]DE[/tex] is given as [tex]\frac{3}{4}[/tex]

So, the ratio of [tex]BC[/tex] and [tex]EF[/tex] will be also [tex]\frac{3}{4}[/tex]

Among the four options, if [tex]BC=12[/tex] and [tex]EF=16[/tex], only then the ratio will be [tex]\frac{3}{4}[/tex]

[tex]\frac{BC}{EF} =\frac{12}{16}= \frac{3}{4}[/tex]

So, the lengths of [tex]BC[/tex] and [tex]EF[/tex] could be 12 and 16 respectively.


Answer:

the correct answer is c


Step-by-stepth explanation:


4.5 divided by 0.5+0.1 in computation words

Answers

Explanation of dividing 4.5 by 0.5+0.1 in computation words.

4.5 divided by 0.5+0.1 can be written as:

4.5 / (0.5 + 0.1)

To solve this, we first add 0.5 + 0.1 to get 0.6. Then, we divide 4.5 by 0.6 to find the result.

The result of the computation is 7.35.

To compute the given expression[tex]\(14.5 \times 0.5 + 0.1\):[/tex]

Multiplication :

  - Multiply [tex]\(14.5\)[/tex]  by [tex]\(0.5\).[/tex]

  - [tex]\(0.5\)[/tex] represents half, so you're essentially halving 14.5.

Half of [tex]\(14.5\) is \(7.25\).[/tex]

Addition :

  - Now add [tex]\(0.1\) to \(7.25\).[/tex]

  - The addition gives [tex]\(7.25 + 0.1 = 7.35.[/tex]

Thus, the result of the computation is 7.35.

Complete question : Write the computation in words: 4.5 divided by 0.5+0.1

a hiker first hike down into a canyon 345 ft below sea level she then hike on her husband 50 ft of the side of the mountain what was the final altitude of the hiker

Answers

the final altitude of the hiker is 6.9ft

A parabola has a vertex at (-1, 0) and opens down. What is the equation of the parabola? y = -x2 - 1 y = -(x - 1)2 y = -(x + 1)2

Answers

When the parabola opens down, it means the x² term must have a minus sign in front of it.

When it has a vertex shifted to the left by 1 (normally it would be at (0,0) this means the x² becomes (x+1)².

Combine these statements and D is the right answer! y = -(x+1)²

Answer:

The answer is D

Step-by-step explanation:

Jane buys People magazine at Walmart each week for $4.99. A 52 week subscription to the magazine is $203.84. How much would she save each week per magazine if she signed up for the subscription?

Answers

STEP 1:
find total cost of purchasing the magazine each week for 52 weeks

= $4.99 * 52 weeks
= $259.48 total

STEP 2:
find difference between purchasing each week and the subscription price

= $259.48 - $203.84
= $55.64 difference/savings


ANSWER: She would save $55.64 if she purchased the subscription.

Hope this helps! :)

there are 200 end of the school year dance tickets available students who have perfect attendance are able to personage them in advance if 18 tickets were purchased in advance then what percent of the tickets were purchased in advance

Answers

9 percent because 18 divided by 200 is 0.09 or 9 percent.

The percentage of the tickets for the dance that were purchased in advance is 9%.

What is the percentage of the tickets that were bought in advance?

Percentage is the fraction of an amount that is expressed as a number out of hundred. The sign used to represent percentage is %.

Percent of advance tickets bought = (number of advance tickets / total number of tickets) x 100

(18 / 200) x 100 = 9%

To learn more about percentages, please check: https://brainly.com/question/25764815

(Please help me!)
Which type of probability is determined by considering all possible outcomes, without actually testing them?

A. Empirical probability
B. Theoretical probability
C. Unpredictable probability
D. Random probability

Answers

Answer: (B) Theoretical probability.

Reason: Theoretical probability is based on reasoning by counting the numbers of favourable outcomes against the number of possible outcomes.

Answer: B. Theoretical probability

Step-by-step explanation: Theoretical probability is based on calculations, and not actual tests.

What is the height of a rectangular prism that has a volume of 192 cubic feet and a base with an area of 48 square feet? Explain your work.

Answers

A rectangular prism has 3 measurements: length (l), width (w) and height (h)
The volume of a rectangular prism has the formula: V=lwh
The area of the base of the rectangular prism is its length times its width; or 
Area of base = lw
So, the volume of the rectangular prism can be written as:
Volume = area of the base * height
Substitute in your numbers:
192=48*h
h=192/48
h=4
So the height is 4 feet

The height of the rectangular prism is 4 feet.

To find the height of the rectangular prism, we can use the formula for the volume of a rectangular prism, which is given by:

[tex]\[ \text{Volume} = \text{Base Area} \times \text{Height} \][/tex]

Given that the volume of the rectangular prism is 192 cubic feet and the base area is 48 square feet, we can set up the equation as follows:

[tex]\[ 192 = 48 \times \text{Height} \][/tex]

To solve for the height, we divide both sides of the equation by the base area:

[tex]\[ \text{Height} = \frac{192}{48} \][/tex]

[tex]\[ \text{Height} = 4 \][/tex]

Therefore, the height of the rectangular prism is 4 feet.

Which of the following is not a valid probability?
A 0.3
B 1
C 0
B 106

Answers

Option B. 106 cannot represent anything, 106% is not a valid percentage. There is no probability about that. However, all the other numbers seem valid, so there.
The probability of any event happening must range from 0 to 1. Anything outside of these bounds is not a possible probability. Therefore, D. 1.06 is an invalid probability.

If nick bought 5 apples for 4.45 what would be the cost for 7 apples

Answers

4.45/5 = .89 ea therefore if you multiply .89 by 7 you would get $6.23
Hi there!

First, we need to divide 4.45 by 5

Which would give us - 0.89

Therefore, now we know that each apple costs $0.89 

2 more apples would be 0.89 + 0.89 + 4.45 = 6.23

Therefore the answer is $6.23 = 7 apples

Hope this helps you!

~DL




Can anybody correct me if I'm wrong? (I might be mixing my answers / questions up a bit) I also need more to be checked but anyways I'm very thankful for those who read into this.

Answers

for #32, the answer is the third one because you mixed up your x and y values, you were on the right track though
#33 is the last one

20/36= x/1200
in this situation, what does x equal?

Answers

20/36 = x/1,200

Cross multiply.
36 × x and 20 × 1,200

36x = 24,000
x = 666.67

x equals 667, or 666.67.
In this situation, x = 666.6666...the six goes on forever. Another way you could write this is 2000/3. How did I get this? First, multiply 1200 by 20, and then divide by 36! Hope this helps!

Which triangles are congruent by ASA

Answers

the correct answer i believe  is  HGF and abc

Answer: ΔHGF≅ ΔABC

Step-by-step explanation:

ASA congruence postulate says that if two angles and the included side of a triangle are congruent to two angles and the included side of next triangle then the triangles are congruent.

In the given figure ΔABC and ΔHGF have the pair of two corresponding angles and the included sides are congruent.

i.e.[tex]\angle{C}\cong\angle{F}[/tex]

[tex]\overline{GF}\cong\overline{BC}[/tex]

tex]\angle{G}\cong\angle{B}[/tex]

Therefore , by ASA congruence postulate:-

ΔABC ≅ ΔHGF

In  ΔTUV , there is only angle given . So there is no enough information to prove it by ASA.

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