The value 5pi/2 is a solution for the equation 2sin^2x -sin x -1=0

Answer:

d. [tex]4x^2-7[/tex]

Step-by-step explanation:

The given functions are

[tex]f(x)=4x+1[/tex] and [tex]g(x)=x^2-2[/tex]

We want to find the composition of the f and g.

[tex]f(g(x))=f(x^2-2)[/tex]

We substitute [tex]x^2-2[/tex] into [tex]f(x)=4x+1[/tex] to obtain;

[tex]f(g(x))=4(x^2-2)+1[/tex]

This simplifies to;

[tex]f(g(x))=4x^2-8+1[/tex]

[tex]f(g(x))=4x^2-7[/tex]

Hence the correct choice is d.

Answer:

So first lets figure out how many pints it is in a year which is 366. Then find out how many pints are in a gallon which is 8 then divide 366 by 8 which is 45.75

Answer:

  3 m, 7 m, 3 m, 7 m

Step-by-step explanation:

The perimeter is the sum of the side lengths, so the perimeters of your quadrilaterals are ...

6 m + 5 m + 4 m + 6 m = 21 m . . . . ≠ 20 m

7 m + 4 m + 4 m + 6 m = 21 m . . . . ≠ 20 m

3 m + 7 m + 3 m + 7 m = 20 m . . . . . This is it!

6 m + 3 m + 5 m + 5 m = 19 m . . . . ≠ 20 m

The quadrilateral with side lengths of 3 m, 7 m, 3 m, and 7 m will have a perimeter of exactly 20 meters, as the sum of these side lengths is 20 meters.

To determine which quadrilateral with the given side lengths will have a perimeter of 20 meters, we need to add the lengths of all the sides for each option and see which one totals 20 meters.

For the first option (6 m, 5 m, 4 m, 6 m), the sum is 6 + 5 + 4 + 6 = 21 meters.

The second option (7 m, 4 m, 4 m, 6 m), the sum is 7 + 4 + 4 + 6 = 21 meters.

The third option (3 m, 7 m, 3 m, 7 m), the sum is 3 + 7 + 3 + 7 = 20 meters.

The fourth option (6 m, 3 m, 5 m, 5 m), the sum is 6 + 3 + 5 + 5 = 19 meters.

Therefore, the quadrilateral with sides measuring 3 m, 7 m, 3 m, and 7 m will have a perimeter of 20 meters.

10% is $8.00 so 20% is $16 and 80-16= 64 so the sale cost is $64.00

Answer:the original price is 240

Step-by-step explanation:

Answer:

Probability of drawing a black card =  [tex]\frac{3}{10}[/tex] or 0.3 .

Step-by-step explanation:

Given : You draw a card at random from a deck that contains 3 black cards and 7 red cards.

To find : What is the probability of drawing a black card.

Solution : We have given that

Deck that contains  black cards  = 3.

Red cards = 7.

Total card = 10.

Probability of drawing a black card = [tex]\frac{3}{10}[/tex].

Probability of drawing a black card = 0.3.

Therefore,  Probability of drawing a black card =  [tex]\frac{3}{10}[/tex] or 0.3 .

Answer:

Probability of drawing a black card =   or 0.3 .

Step-by-step explanation:

Given: You draw a card at random from a deck that contains 3 black cards and 7 red cards.

To find: What is the probability of drawing a black card.

Solution: We have given that

A deck that contains  black cards  = 3.

Red cards = 7.

Total card = 10.

Probability of drawing a black card = .

Probability of drawing a black card = 0.3.

Therefore,  Probability of drawing a black card =   or 0.3 .

Answer:

There are total 12 outfit combinations.

Step-by-step explanation:

Number of hat are: 2

1 red hat and 1 black hat

Number of shirt are: 3

1 white shirt , 1 black shirt , 1 black-and-white striped shirt.

Number of pants are: 2

1 black and 1 blue

Now, the total number of combinations could be seen with the help of a tree diagram.

We observe that total 12 combinations are possible.

Answer:

9

Step-by-step explanation:

Orders of operation tells us we have to multiply or divide first, whichever one comes first from left to right; then we add or subtract from left to right.  It looks like we have a 2*3 which is 6.  That changes our expression to

5 + 10 - 6,

which is 15 - 6 which is 9

I think it's B, because the grah becomes greater and greater by every point. It starts from - infinite and it keeps going up to + infinite.

The graph tells us the following about the value of c in this function: D. c is less than zero.

In Mathematics and Euclidean Geometry, a radical function or nth root function can be represented by using the following mathematical equation:

[tex]f(x)=a(x+k)^{\frac{1}{n} }+c[/tex]

where:

By critically observing the graph shown above, we can logically deduce that the graph represents a nth root function and the value of c does not equal zero because it isn't symmetrical about the x-axis.

Since the parent nth root function was vertically shifted down and horizontally to the left, it implies that the value of c must be negative and less than zero.

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Dividing 4x by 4 isolates x on one side of the equation

Answer: option c.

Step-by-step explanation:

 To solve the given exercise and write the expression as a single logarithm, you must keep on mind the following properties:

[tex]m*log(a)=log(a)^m[/tex]

[tex]log(a)-log(b)=log(\frac{a}{b})[/tex]

Therefore, by applying the properties shown above, you can rewrite the expression given, as following:

[tex]2logx-6log(x-9)=logx^2-log(x-9)^6=log(\frac{x^2}{(x-9)^6})[/tex]

Then as you can see, the answer is the option c.

Answer:  a) A = 3

               b) P = 4

               c) [tex]\bold{3\ cos\dfrac{\pi}{2}x}[/tex]

Step-by-step explanation:

[tex]Amplitude (A) = \dfrac{max-min}{2}\\\\\\.\qquad \qquad \qquad =\dfrac{6}{2}\\\\\\.\qquad \qquad \qquad =\boxed{3}[/tex]

Period (P) is the reciprocal of the frequency (f)

f = [tex]\frac{1}{4}[/tex]   →    P = [tex]\frac{4}{1}\quad =\boxed{4}[/tex]

y = A cos (Bx - C) + D

[tex]\large{\boxed{y=3\ cos\dfrac{\pi}{2}x}}[/tex]

Answer:

c. [tex]\displaystyle y = 3cos\:\frac{\pi}{2}x[/tex]

b. [tex]\displaystyle 4[/tex]

a. [tex]\displaystyle 3[/tex]

Explanation:

[tex]\displaystyle \boxed{y = 3sin\:(\frac{\pi}{2}x + \frac{\pi}{2})} \\ y = Asin(Bx - C) + D \\ \\ Vertical\:Shift \hookrightarrow D \\ Horisontal\:[Phase]\:Shift \hookrightarrow \frac{C}{B} \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \\ Amplitude \hookrightarrow |A| \\ \\ Vertical\:Shift \hookrightarrow 0 \\ Horisontal\:[Phase]\:Shift \hookrightarrow \frac{C}{B} \hookrightarrow \boxed{-1} \hookrightarrow \frac{-\frac{\pi}{2}}{\frac{\pi}{2}} \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \hookrightarrow \boxed{4} \hookrightarrow \frac{2}{\frac{\pi}{2}}\pi \\ Amplitude \hookrightarrow 3[/tex]

OR

[tex]\displaystyle y = Acos(Bx - C) + D \\ \\ Vertical\:Shift \hookrightarrow D \\ Horisontal\:[Phase]\:Shift \hookrightarrow \frac{C}{B} \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \\ Amplitude \hookrightarrow |A| \\ \\ Vertical\:Shift \hookrightarrow 0 \\ Horisontal\:[Phase]\:Shift \hookrightarrow 0 \\ Wavelength\:[Period] \hookrightarrow \frac{2}{B}\pi \hookrightarrow \boxed{4} \hookrightarrow \frac{2}{\frac{\pi}{2}}\pi \\ Amplitude \hookrightarrow 3[/tex]

Keep in mind that although you are told write a cosine equation, if you plan on writing your equation as a function of sine, then there WILL be a horisontal shift, meaning that a C-term will be involved. As you can see, the photograph on the right displays the trigonometric graph of [tex]\displaystyle y = 3sin\:\frac{\pi}{2}x,[/tex] in which you need to replase "cosine" with "sine", then figure out the appropriate C-term that will make the graph horisontally shift and map onto the cosine graph [photograph on the left], accourding to the horisontal shift formula above. Also keep in mind that the −C gives you the OPPOCITE TERMS OF WHAT THEY REALLY ARE, so you must be careful with your calculations. So, between the two photographs, we can tell that the sine graph [photograph on the right] is shifted [tex]\displaystyle 1\:unit[/tex]to the right, which means that in order to match the cosine graph [photograph on the left], we need to shift the graph BACKWARD [tex]\displaystyle 1\:unit,[/tex]which means the C-term will be negative, and by perfourming your calculations, you will arrive at [tex]\displaystyle \boxed{-1} = \frac{-\frac{\pi}{2}}{\frac{\pi}{2}}.[/tex]So, the sine graph of the cosine graph, accourding to the horisontal shift, is [tex]\displaystyle y = 3sin\:(\frac{\pi}{2}x + \frac{\pi}{2}).[/tex]Now, with all that being said, in this case, sinse you ONLY have a wourd problem to wourk with, you MUST use the above formula for how to calculate the period. Onse you figure this out, the rest should be simple. Now, the amplitude is obvious to figure out because it is the A-term, but of cource, if you want to be certain it is the amplitude, look at the graph to see how low and high each crest extends beyond the midline. The midline is the centre of your graph, also known as the vertical shift, which in this case the centre is at [tex]\displaystyle y = 0,[/tex]in which each crest is extended three units beyond the midline, hence, your amplitude. So, no matter how far the graph shifts vertically, the midline will ALWAYS follow.

b. To find the period [units of time], simply take the multiplicative inverce of the frequency, or use the formula below:

[tex]\displaystyle F^{-1} = T[/tex]

a. To find the amplitude, simply split the height in half.

I am delighted to assist you at any time.

The answer is C.

3 (20-14)=44

(distribute the 3, then subtract)

THE  ANSWER IS BECAUSE 2X14 IS 28 SO 28 - 6 IS 22

Solving systems of equations by elimination involves creating a new equation where one variable cancels out when the equations are added or subtracted. This often means multiplying one or both of the original equations by a certain number. Once one variable is found, it can be substituted back into an original equation to solve for the remaining variable.

To solve the system of equations by the elimination method, you need to create an equation where one of the variables cancels out when you add or subtract the two equations. This is often done by multiplying one or both of the equations by a number.

For example, for the system of equations given by Equation A: 3x + 4y = 52 and Equation B: 5x + y = 30, you would multiply Equation B by 4 to get 20x + 4y = 120. If you subtract Equation A from this new equation, you eliminate y, with the result being 17x = 68, or x = 4. You can then substitute x = 4 into either original equation to solve for y.

The other options in the question follow the same basic procedure, with the aim being to cancel out one variable in order to solve for the other, and then substituting back in to find the value of the remaining variable.

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The correct first steps for applying the elimination method involve multiplying the equations to facilitate the elimination of one variable. Specific correct steps include multiplying Equation B by -4, Equation B by 2, and Equation A by -3 in their respective systems.

To solve the system of equations using the elimination method, we need to manipulate the equations so that adding or subtracting them eliminates one of the variables. Let's examine the potential steps for different systems provided:

For equations A (3x + 4y = 52) and B (5x + y = 30), multiplying Equation B by -4 provides: -4(5x + y) = -4(30) => -20x - 4y = -120.

For equations A (-2x + 3y = -1) and B (x + 5y = 25), multiplying Equation B by 2 gives: 2(x + 5y) = 2(25) => 2x + 10y = 50.

For equations A (2x + y = 2) and B (-3x + 3y = 10), there is no need to multiply, as elimination isn't straightforward here.

For equations A (4x + y = 3) and B (6x + 3y = 9), multiplying Equation A by -3 yields: -3(4x + y) = -3(3) => -12x - 3y = -9.

Therefore, the correct first steps for applying the elimination method are:

Multiply Equation B by -4 for the first system.

Multiply Equation B by 2 for the second system.

Multiply Equation A by -3 for the fourth system.

Answer:

  b.  6 cm

Step-by-step explanation:

Q is the midpoint of PR, so QR = PR/2 = (12 cm)/2 = 6 cm

Answer:

a) 68%; b) 99.5%

Step-by-step explanation:

The empirical rule states that 68% of data falls within 1 standard deviation of the mean; 95% of data falls within 2 standard deviations of the mean; and 99.7% of data falls within 3 standard deviations of the mean.

For part a,

We are asked the approximate percentage of women whose platelet counts are within 1 standard deviation of the mean.  According to the empirical rule, this is 68%.

For part b,

We are given the endpoints of the interval.  The lower endpoint is 181.5; this is 250.8-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is 2 standard deviations away from the mean.

The higher endpoint is 320.1; this is 320.1-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is standard deviations away from the mean.

This means this interval includes about 95% of women.

Final answer:

Using the empirical rule, approximately 68% of women have platelet counts within 1 standard deviation of the mean (181.5 to 320.1), and approximately 95% have counts within 2 standard deviations of the mean (112.2 to 389.4).

Explanation:

The question asks to apply the empirical rule, also known as the 68-95-99.7 rule, which states that for a normal distribution:

Approximately 68% of the data falls within 1 standard deviation of the mean.

Approximately 95% of the data falls within 2 standard deviations of the mean.

Approximately 99.7% of the data falls within 3 standard deviations of the mean.

We have a mean (μ) of 250.8 and a standard deviation (σ) of 69.3 for the blood platelet counts.

Part (a)

Within 1 standard deviation of the mean (181.5 to 320.1):

Approximately 68% of the women fall in this range.

Part (b)

Within 2 standard deviations of the mean (112.2 to 389.4):

Approximately 95% of the women fall in this range.

√(3x+4)≥0 (otherwise it becomes imaginary)

3x+4≥0

3x≥-4

x≥-4/3

Y=2(0)-5 (it's the lowest x value, and that means it will limit y)

Y=-5

As x can be > -4/3, let's try for another Y value

Y=2√(3(5/3)+4)-5

Y=2√9-5

Y=6-5

Y=1

1>-5

So, Y≥-5

Answer is A

Answer:

i think c or a

Step-by-step explanation:

Answer:

b.x = -4/3+4/3i , -4/3-4/3i

Step-by-step explanation:

We have given a quadratic equation.

9x²+24x+32  = 0

We have to find the solution of given equation by using the quadratic formula.

From given equation,

a  = 9,b = 24 and c = 32

x = (-b±√b²-4ac) / 2a is quadratic formula to solve equation.

Putting values in above formula, we have

x = (-24±√(24)²-4(9)(32) ) / 2(9)

x = (-24±√576-1152) / 18

x = (-24±√-576) / 18

x = -24 ± 24i  / 18

x = 6(-4±4i) / 18

x = -4±4i / 3

x = -4/3+4/3i , -4/3-4/3i which is the solution.

Answer:

The state with the second lowest population has the lowest population density.

Step-by-step explanation:

The state with the second lowest population has the lowest population density.

State B has the second lowest population, and it has the lowest population distance considering it has a substantial amount of area compared to other states, yet 1, 333, 089 people, in comparison it therefore as the lowest population density.

The statement "The state with the second-lowest population has the lowest population density." is true.

The population density can be found by dividing the total population of an area by the area.

We must calculate the population densities of all the states to determine which state has the highest density.

This can be done as shown below:

State A:

Population density = Population/Area

= 1,055,173/2,677

= 394.162

State B:

Population density = Population/Area

= 1,333,089/36,418

= 36.605

State C:

Population density = Population/Area

= 3,596,677/5,543

= 648.87

State D:

Population density = Population/Area

= 6,745,408/10,555

= 639.072

We can see that the state with the second-lowest population has the lowest population density.

Therefore, we have found that the statement "The state with the second-lowest population has the lowest population density." is true. The correct answer is option B.

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731934030

7.31934039*10^8

Answer:

731,934,030

Step-by-step explanation:

The probability distribution is not given since the sum of the probabilities is not 1.

Given a table of values where x is the number of women ted approaches before encountering the one who reacts positively.

Each of the probabilities of the women reacting positively is also given.

All the value of the probabilities lies between 0 and 1.

Now, find the sum of the probabilities.

ΣP(x) = 0.001 + 0.008 + 0.034 + 0.057

         = 0.1

Here, the sum of the probability should be 1, not 0.1, in order to be a probability distribution.

Hence the given distribution is not a probability distribution.

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The table of distribution which is not in question is given below:

x      P(x)

0    0.001

1     0.008

2    0.034

3    0.057

The height of a triangle with an area of 3.6 cm² and a base of 6 cm is calculated using the area formula, resulting in a height of 1.2 cm.

To find the height of a triangle when the area and base are known, we use the formula for the area of a triangle, which is area = 1/2 × base × height. The given area is 3.6 cm2, and the base is 6 cm. Rearranging the formula to solve for the height, we get height = (2 × area) / base.

Plugging the values in, we get height = (2 × 3.6 cm2) / 6 cm = 7.2 cm2 / 6 cm = 1.2 cm.

Thus, the height of the triangle is 1.2 cm, which corresponds to option B.

The height of a triangle with an area of 3.6 cm² and a base of 6 cm is found by rearranging the formula for the area of a triangle. The calculated height comes out to be 1.2 cm.

To find the height of a triangle given the area and base, we can use the formula for the area of a triangle which is Area = (1/2) × base × height. In this case, the area is 3.6 cm² and the base is 6 cm.

Rearranging the area formula to find the height, we get height = (2 × Area) / base. Plugging in the values, we have:

height = (2 × 3.6 cm²) / 6 cm = 7.2 cm² / 6 cm = 1.2 cm.

Therefore, the correct answer to the question is B. 1.2 cm.

Answer:

You would save $18

Step-by-step explanation:

(27/3)*2 = $18

Replace x with the value in the answers and solve for Y to see which ones match.

y = 1-4 = -3

y = -1-4 = -5

(1,-3), (-1,-5) is the answer.

Leslie needs to divide 48 ounces by the conversion factor of 16 ounces per pound to find out she needs 3 pounds of charcoal for her grill.

Leslie is seeking to understand how much charcoal she should purchase in pounds if she needs 48 ounces for her grill. Since the question involves converting ounces to pounds, we can use the conversion factor that 1 pound is equal to 16 ounces. To find out how many pounds are in 48 ounces, we divide 48 by 16.

48 ounces divided by 16 ounces per pound equals 3. Therefore, Leslie will need to buy 3 pounds of charcoal for her grill.

Answer:

[tex]x=\frac{13\sqrt{2} }{2}[/tex]

Step-by-step explanation:

We can use the sine ratio to find the value of [tex]x[/tex].

Recall the mnemonics SOH; which  means sine is Opposite over Hypotenuse.

[tex]\sin(45\degree)=\frac{x}{13}[/tex]

This implies that;

[tex]x=13\sin(45\degree)[/tex]

[tex]x=\frac{13\sqrt{2} }{2}[/tex]

Answer:

The surface area is [tex]2,440\ m^{2}[/tex]

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The surface area of a triangular prism is equal to

[tex]SA=2B+PH[/tex]

where

B is the area of the triangular base

P is the perimeter of the triangular face

H is the height of the prism

Find the area of the base B

[tex]B=\frac{1}{2}(42)(20)=420\ m^{2}[/tex]

Find the perimeter of the base P

[tex]P=(42+29+29)=100\ m[/tex]

we have

[tex]H=16\ m[/tex]

substitute the values

The surface area is

[tex]SA=2(420)+100(16)=2,440\ m^{2}[/tex]

First we need to find the length. So we do 126/3 to get 42. The length is 42. Now to find perimeter we do 2(42)+2(3) or 42+42+3+3.

Both ways are right ways. The perimeter is 90 meters.

Hope that helps!!

To find the perimeter of a rectangular flowerbed, divide the area by the width to find the length. Then, use the formula Perimeter = 2(length + width) to calculate the perimeter.

To find the perimeter of a rectangular flowerbed, we need to add up the lengths of all its sides. In this case, we're given that the width of the flowerbed is 3 meters, but we need to find the length. We can find the length by dividing the area of the flowerbed by its width.

Area = length × width

126 = length × 3

length = 126/3

length = 42 meters

Now that we know the length and the width, we can calculate the perimeter.

Perimeter = 2(length + width)

Perimeter = 2(42 + 3)

Perimeter = 2(45)

Perimeter = 90 meters

Answer:

Picture 1 is the answer.

Step-by-step explanation:

The expression states that the absolute value of a number x , is equal to the number 7. Absolute Values have an 2 inputs for every output (except for 0), the negative and positive inputs both output the same positive number.

Example: abs(-5) = abs(5) = 5

The Absolute value of -5 and 5 both output 5. Therefore, there are two possible x values for the answer to be 7 and those values are -7 and 7. Since these are the only possible values they would be represented on a number line as closed dots.

The only picture with closed dots on both -7 and 7 is picture 1. So that is the answer.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

Answer: graph one

Step-by-step explanation: