Please answer this question only if you know the answer!! 39 points and brainliest!

Answer:

Unusual, because the result is less than the minimum usual value

Step-by-step explanation:

A result of 55 heads out of the 140 trials is to be considered unusual .

In a fair coin toss, the probability of getting heads (H) or tails (T) is each 0.5 (50%) because there are two equally likely outcomes. Therefore, if you were to toss a fair coin 140 times, you would expect to get heads approximately half the time, which is 140 * 0.5 = 70 times.

Consider the result of 55 heads. This result is less than the expected value of 70 heads for 140 tosses. It is slightly below what you would anticipate for a fair coin.

So this result would be unusual.

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Simplify √8 to 2√2

2√2 + √98 + √72

Simplify √98 to 7√2

2√2 + 7√2 + √72

Simplify √72 to 6√2

Simplify

= 15√2

Answer:

C

Step-by-step explanation:

√8 + √98 + √72

√(4×2) + √(49×2) + √(36×2)

2√2 + 7√2 + 6√2

15√2

Answer C.

Answer:

4.9 I have to go and get the games and she said that she would be doing the same thing on my mind

Answer:

6.5 feet

Step-by-step explanation:

[tex]v = w \times h \times l[/tex]

We know the Volume is 234 ft

and we know the width is 4.5 ft and the length is 8 feet, we can set up or formula and solve for the height.

234=4.5 × 8 x h

234=36 x h

234÷36=h

6.5=height

Answer:

Step-by-step explanation:

b.)

amplitude: 4

period; 4pi

phase shift; pi/2

vertical shift: -3

Analyzing the graph shows that the parameters are in

b. amplitude: 4

period; 4π

phase shift; π/2

vertical shift: -3

Amplitude: The amplitude of a periodic function is the measure of its maximum displacement from its average or equilibrium position.

Period: The period of a periodic function is the distance along the x-axis between one cycle of the function and the next identical cycle.

Vertical Shift: The vertical shift (or translation) of a function is a vertical displacement of the entire graph either upward or downward.

Phase Shift: The phase shift is a horizontal displacement or translation of a function.

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Answer:144

Step-by-step explanation: 144 since width times length times height equals volume. so 5 times 2 times ? equals 1440.  So 10 times ? equals 1440.  So next 1440 divided by 10 equals 144.  So the answer is 144.

Answer:

Step-by-step explanation:

144 cm.

Answer:

D! found it out for the brainly gang:)

Step-by-step explanation:

The expression represents the volume of the cone that is times the volume of the pyramid that it fits inside is Pi/4(4r²/3).

We have given that the expression represents the volume of the cone

that is times the volume of the pyramid that it fits inside

(2r^2h) (4r^2h)

The formula for the volume of a cone is ⅓ r^2h cubic units.

where r is the radius of the circular base and h is the height of the cone.

Therefore from the given we get the volume of a pyramid is Pi/4(4r²/3).

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Answer:

I think the answer is B Plz tell me if im wrong

Good luck on your test!

Answer:

- 12 divided by 1/6 =n

Step-by-step explanation:

Let the total number of comic books collection be n

Number of comic books=12

Also, according to question number of comic books=1/6 of n

therefore,

1/6 of n=12

n=12×6

n=72

Thus, correct answer is option (a)

I don't know the area of a parallelogram off the top of my head but you can use the area of the rectangle and the area of the triangle and add those. The area of the triangle is 1/2*base*height and use the pythagorean theorem to find the base. 3² + b² = 5²; 9 + b² = 25; b² = 16; b = 4. The area of the triangle is 1/2*4*3 or 6 in. Since there are two of them, the total area of the triangles are 12 in. The area of the rectangle is length*width or (12 - 4) * 3 which is 8 * 3 or 24in. Add these areas together to get 36in total

The area of the given rectangle is 36 inch^2.

The area of a parallelogram is off the top of my head but you can use the area of the rectangle and the area of the triangle and add those.

The area of the triangle is 1/2*base*height

use the Pythagorean theorem to find the base.

3² + b² = 5²

9 + b² = 25

b² = 16

b = 4.

The area of the triangle is 1/2*4*3 or 6 in.

Since there are two of them, the total area of the triangles are 12 in.

The area of the rectangle is length*width or (12 - 4) * 3 which is 8 * 3 or 24in.

Add these areas together to get 36in total.

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Answer:

option D

Step-by-step explanation:

To quickly solve this problem, we can use a graphing tool or a calculator to plot the equation.

Please see the attached image below, to find more information about the graph

The equation is:

y=Arc cos (1/3x)    ;  -5≤x≤5

The answer is option D

Answer:

60 mph

Step-by-step explanation:

time = distance/speed

If s represents the return speed, then the relationships of the travel times is ...

300/(s-10)-1 = 300/s

300s -s(s-10) = 300(s-10) . . . . . multiply by s(s-10)

-s^2 +310s = 300s -3000 . . . . eliminate parentheses

s^2 -10s -3000 = 0 . . . . . . . . . . write in standard form

(s -60)(s +50) = 0 . . . . . . . . . . . . factor

This has solutions s=60, s=-50. The negative solution is extraneous.

The return speed was 60 mph.

We want to find the speed in your return given that increasing the speed by 10 mph would saved you an hour of trip.

The speed was 72.62 mi/h

We know the relationship:

distance = speed*time

Let's assume the speed is represented with the variable S, and the time it took you to return is represented with T.

We know that the distance of the roundtrip was 600 miles.

then we can write:

600mi = S*T

Now we know that if we increase the speed by 10mi/h, the time decreases by one hour, so we can also write:

600mi = (S + 10mi/h)*(T - 1h)

So we have a system of equations:

To solve this, we can isolate one of the variables in one of the equations and then replace that on the other equation.

I will isolate T in the first one:

T =  600mi/S

Now we replace this in the other equation to get:

600mi = (S + 10mi/h)*(600mi/S - 1h)

Now we can solve this for S, the speed.

600mi = 600mi - 1h*S + (6,000 mi^2/h)/S - 10mi

0 = -1h*S + (6,000 mi^2/h)/S - 10mi

Now we multiply both sides by S to get:

0 = -1h*S^2 + (6,000 mi^2/h) - 10mi*S

This is a quadratic equation, we can solve this byt using the Bhaskara's formula:

[tex]S = \frac{10mi \pm \sqrt{(10mi)^2 - 4*(6,000 mi^2/h)*(-1h)} }{2*(-1h)} \\\\S = \frac{ 10mi \pm 155.24mi}{-2h}[/tex]

We need to take the positive solution, so we get:

S = (10mi - 155.24 mi)/(-2h) = 72.62 mi/h

The speed was 72.62 mi/h

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A. 1/4 because numbers 6 and 3 have 2 bigger of a chance than the other numbers, so the spinner is out of 8. Since 3 has double the chance of being landed on than 1,2,4, and 5, than the probability of the spinner landing on the number 3 is 2/8, which is simplified to 1/4

Without specific details about the spinner, it's impossible to accurately determine the probability of landing on 3. Assuming a hypothetical spinner with numbers 1-8, the answer would be C. 1/8.

The subject of your question is probability, which is a branch of Mathematics. The probability of an event is calculated by dividing the number of ways an event can occur by the total number of possible outcomes. Given your question, if we are to find the probability of landing on 3, we need to know how many '3's there are on the spinner, and how many total outcomes there are. Unfortunately, without a provided image or additional details about the spinner, it's impossible to accurately determine the probability.

Assuming a standard spinner with one '3' and eight total outcomes (numbers 1 through 8), the probability would be 1/8, so the answer should be C. 1/8. But again, this is based on assumptions, the actual answer could vary if the information about the spinner is different.

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Answer:

The correct answer option is A. [tex]\frac{x^{12}}{64}[/tex].

Step-by-step explanation:

We are given the following expression and we are to simplify it:

[tex] ( 4 x ^ { - 4 } ) ^ { - 3 } [/tex]

Distributing the power among the terms to get:

[tex] 4 ^ { - 3 } . 4 ^ { - 4 * - 3 } [/tex]

[tex]4^{-3}.x^{12}[/tex]

[tex]\frac{x^{12}}{4^3}[/tex]

[tex] \frac { x ^ { 1 2 } } { 6 4 } [/tex]

Answer:

He earned 120% out of 150%.

Step-by-step explanation:

The test is work 150 points, while each question being 10 points each, so we can divide this and we will get 15 questions. Then we can just multiple, 10 by 12 and get 120, this means he got 12 out of 15 questions right, or 120%out of 150%.

What is your question??

Ms. Nash, an executive with a television company, is trying to decide on the subject matter for a new television series for adults. She chooses to conduct a survey to help her make an informed decision. Which of the following sampling techniques should Ms. Nash use in order to obtain the most representative sample of the viewing audience?

Ms. Nash should ask a randomly–chosen, equal number of men and women shopping at a department store.

Ms. Nash should ask the first two hundred men she encounters on the busy street in front of her office.

Ms. Nash should ask five men and five women shopping at a local grocery store.

Ms. Nash should ask men and women from a variety of age ranges who are attending a science fiction movie festival.

It’s the first one

Final answer:

Ms. Nash should use a stratified random sampling method to ensure a representative sample of the viewing audience for a new TV series. The best option available is to query men and women from a variety of age ranges at a science fiction movie festival, despite potential genre bias.

Explanation:

Ms. Nash, an executive with a television company, should employ a sampling technique that ensures a representative sample of the adult viewing audience for a new television series. The most effective approach would be to use random sampling with a stratified design, which takes into account various characteristics such as age, gender, and possibly other demographics or interests relevant to the content of the television series. Although none of the options provided perfectly align with this methodology, the most appropriate among them is the fourth option, which suggests asking men and women from a variety of age ranges who are attending a science fiction movie festival. This method attempts to achieve some level of stratification by including a variety of age ranges, which is a crucial aspect when trying to extrapolate the preferences of a larger population. Moreover, by selecting from men and women, there is an acknowledgment of the need to balance gender representation. However, the choice of a science fiction movie festival may introduce a selection bias toward viewers who prefer that genre, so it's not entirely ideal for a general audience survey.

Answer:

.4 is the answer

Step-by-step explanation:

This is a right triangle problem.  We have one leg as .5 in length and the other leg as 1.2 in length.  The "straight" way to your grandma's house is the hypotenuse.  We need to find that length which will give us the distance straight from your house to their house if you didn't have to go out of your way to avoid the water.  The hypotenuse is found with Pythagorean's Theorem.  It will be filled in and solved as follows:

[tex].5^2+1.2^2=c^2[/tex]

[tex].25+1.44=c^2[/tex]

[tex]1.69=c^2[/tex]

and c = 1.3

That's the straight distance.  You had to go out of your way to the tune of .5+1.2 which is 1.7 miles.  You figure out how much shorter it is taking the straight path by subtracting 1.7 - 1.3 which is .4

Answer:

Five more than the square of a number= 5 + x²

Five more than twice a number = 5 + 2x

Five less than the product of 3 and a number = 3x - 5

Five less the product of 3 and a number = 5 -3x

Twice the sum of a number and 5 = 2(x + 5)

The sum of twice a number and 5 = 2x + 5

The product of a cube of a number and 5= 5x³

The cube of the product of 5 and a number= (5x)³

Olá

Answer:

(5x)³=

(5x) ao cubo  

5.5.5=125X³

2(x+5)= 2x+10

             2x=10

              x=10/2

                X=5

2x+5= 2x - 5 = 0  

2x = 0 + 5  

2x = 5  

x = 5/2

3x-5= 3x= +5

           X= 5/3 or X= 1,6

5+2x= 2x=-5

            X= -5/2

5+x²= x²+5  a=1 b= 5 c=0

5²-4.1.0 (corta,pois -4.1.0=0)

=25  

x= -b +/- raíz de bhaskara/ 2.a

x=-5 +/- 5/2

x'= 0/2=0

x"=  -10/2= -5

5-3x= 3x=-5

          X= -5/3

5x³ = 0   a=5 b= 0 c=0

0²-4.5.0

= 0 (duas raízes reais e iguais)

x'= 0

x"= 0

Espero ajudar♥

Answer:

a

Step-by-step explanation:

When two triangles are similar, their corresponding sides are in proportion. The length of NO cannot be determined from the given information.

When two triangles are similar, their corresponding sides are in proportion. In this case, the scale factor is 3/2, meaning that the corresponding sides of triangle ABC and triangle MNO are in the ratio of 3:2.

To find the length of side NO, we can set up the proportion:

AB/MN = BC/NO = AC/OO

Since we know that AB = 3 and MN = 2, we can solve for NO:

3/2 = BC/NO

3NO = 2BC

NO = (2/3)BC

Therefore, the length of NO is (2/3) times the length of BC.

Since we don't know the length of BC, we cannot determine the exact length of NO. The answer choices provided do not match the information given, so none of the given options can be correct.

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Answer: 300 feet

The biggest challenge in this problem is that it includes a fraction.

So, we can make this question easier by figuring out how many feet this train travels in 1 second.

If we know how far it traveled in 1 second, then we can quickly figure out how far it goes in 4 seconds.

Since the train travels 25 feet in 1/3 of a second, then it must travel 3 times that far in 1 second:  

25 feet x 3 = 75

We now know that this train must travel 75 feet in 1 second. Now we can solve for 4 seconds quite simply.

If the train travels 75 feet in 1 second, then how far will it travel in 4 seconds? We need to multiply 75 by 4 to get our answer:

75 x 4 = 300 feet

A high-speed train travels 25 feet in 1/3 second. In 4 seconds, the train will have traveled 300 feet

In question, the distance traveled by a high-speed train in 1/3 seconds is 25 feet.

Therefore, If a train travels 25 feet in 1/3 second, then it must travel 3 times the distance in 1 whole second.

That means,

25*3 = 75 feet

If a train travels 75 feet in 1 second, then the distance traveled in 4 seconds is;

75*4 = 300 feet

Hence, in 4 seconds, the train will have traveled 300 feet

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Answer:

3 boxes

Step-by-step explanation:

2 out of 16 boxes are flawed. So the unit rate is

[tex]\frac{2}{16}=\frac{1}{8}[/tex]

Now, to find number of flawed boxes is 24 checkings, we need to multiply the unit rate (1/8) by 24. So:

[tex]\frac{1}{8}*24=3[/tex]

The answer is 3

Answer:

Trust me the answer is 3

Step-by-step explanation:

Also please give me some Hearts

Answer:

PS = 7

k = 9

Step-by-step explanation:

RS = PQ                   Given

3x  - 7 = x - 1            Substitute algebraic terms. Subtract x from both sides

3x-x - 7 = x - 1 - x    Combine

2x - 7 = - 1                Add 7 to both sides.

2x - 7+7 = -1+7         Combine

2x = 6                      Divide by 2

2x/2 = 6/2

x = 3

Length of PS = x - 1 + x + 3x - 7

Length of PS = 5x - 8

Length of PS = 5*3 - 8

Length of PS = 7

=========================

f(x) = k - x^2

x = 2

f(x) = 5  is the given point

5 = k - x^2      Substitute for x^2

5 = k - 2^2      Expand

5 = k - 4          Add 4 to both sides.

5+4=k-4+4      Combine

k = 9

Answer:

V = 60

Step-by-step explanation:

The formula for the volume of a square based pyramid is: V = a² × h/3 where a = the edge and h = the height

to solve we just plug it in:

V = 6² × 5/3

V = 36 × 5/3

V = 36/1 ×5/3 (another way of writing the above)

V = 180/3 <-- simplify

V = 60

Answer:

48

Step-by-step explanation:

Formula: a^2*(h/3)

We know a is 6ft, but to find h, the height, we'll need to use Pythagoreon Theorem. The hypothenuse of the triangle is 5 and one of the legs is 3, because you need to divide 6 by 2.

3^2+b^2=5^2

9+b^2=25

b^2=16

b=4

Now plug in a and h into the formula to get 48.

1.8y is the answer because first you do 3/4y into a decimals number and then it’s 0.75 then I times it by 2.4 which is 1.8y

To solve the equation 3/4 y = 2.4x for y, we multiply both sides of the equation by 4/3 to eliminate the fraction. Simplifying the equation gives us y = 3.2x. The constant of proportionality in this equation is 3.2.

To solve the equation 3/4 y = 2.4x for y, we need to isolate y on one side of the equation. First, we can multiply both sides of the equation by 4/3 to eliminate the fraction:

3/4 * y = 2.4x

y = (2.4x)/(3/4)

Next, we can simplify the equation by multiplying the numerator and denominator of the fraction by the reciprocal of 3/4, which is 4/3:

y = (2.4x) * (4/3)

y = (9.6x)/3

y = 3.2x

Therefore, the equation 3/4 y = 2.4x can be solved for y to give the expression y = 3.2x. The constant of proportionality in this equation is 3.2, which indicates that y is directly proportional to x with a scale factor of 3.2.

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Answer:4.64

Step-by-step explanation: I took the test on this and it was correct

Answer:

4.64

Step-by-step explanation:

bcuz sir ghost said so

Answer:

Step-by-step explanation:

Keep in mind that the derivative of ln(u) = u'/u.  Here, our u is x^2 + y^2, so the derivative of that will fit in for u'.  Let's do this step by step:

[tex]xy=ln(x^2+y^2)[/tex]

Working on the left first, using the product rule, the derivative (implicite, of course!) is:

[tex]x\frac{dy}{dx}+1y=ln(x^2+y^2)[/tex]

Now we will work on the right side, keeping in mind the rule above for derivatives of natural logs:

[tex]x\frac{dy}{dx}+1y=\frac{2x+2y\frac{dy}{dx} }{x^2+y^2}[/tex]

Now we are going to get rid of the donominator on the right by multiplication on both sides:

[tex](x^2+y^2)(x\frac{dy}{dx}+1y)=2x+2y\frac{dy}{dx}[/tex]

Distribute on the left to get

[tex]x^3\frac{dy}{dx}+x^2y+xy^2\frac{dy}{dx}+y^3=2x+2y\frac{dy}{dx}[/tex]

Now collect all the terms with dy/dx in them on one side and everything else goes on the other side:

[tex]x^3\frac{dy}{dx}+xy^2\frac{dy}{dx}-2y\frac{dy}{dx}=2x-x^2y-y^3[/tex]

Factor out the common dy/dx:

[tex]\frac{dy}{dx}(x^3+xy^2-2y)=2x-x^2y-y^3[/tex]

and divide on the left to isolate the dy/dx:

[tex]\frac{dy}{dx}=\frac{2x-x^2y-y^3}{x^3+xy^2-2y}[/tex]

And there you go!

Answer:

12%

Step-by-step explanation:

To solve this problem, we need to find the probability that someone is in the brass section and play trombone.

To do this, we can multiply the probability of someone being in the brass section and the probability of someone playing trombone.

[tex]0.5*0.24=0.12[/tex]

Therefore, it is 12% that a randomly selected band members is in the brass section and plays trombone.

Answer: 12 percent

Step-by-step explanation:

the answer is J) 2

because the x values are going up in twos and the yard values are adding one each time.

so

(8,1)

and

(10, 2)

hope this helps

The perimeter of a rectangle si length + length + width + width or 2l + 2w. Substitute your values in to get 2(70) + 2(65) → 140 + 130 → 270 feet

1. Plug in " -2 " into f

f(-2) = 3 (-2) - 1

f(-2) = -6 - 1

f(-2) = -7

2. Plug in "5" into g

g(5) = -(5) + 6

g(5) = -5 + 6 = 1

3. Add what you got when you solved for f(-2) and g(5) together

f(-2) + g(5) = ?

f(-2) + g(5) = -7 + 1

f(-2) + g(5) = -6

Your answer is A

Don't forget to vote brainliest! I hope I helped! :)

F(x)= 3x -1

G(x)= -x + 6

F(-2) + g(5)= ?

F(-2)= 3(-2) -1

F(-2)= -6 -1

F(-2)= -7

G(5)= -5 + 6

G(5)= 1

F(-2) + g(5) =

-7 + 1 = -6

A) -6