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Answer:

x=

Step-by-step explanation:

⅔x= 7x-1

2/3x=6

multiply both sides by 3/2

(3/2)(2/3x)= 6×3/2

x=

(a) Ratio of the volume of a right circular cone to the volume of a cylinder with same height and base radius= 1/3

(b)Ratio of the volume of a paraboloid to the volume of a cylinder= 1/2

(c)Ratio of the volume of a sphere and cylinder= 4/6

(a)Let r be the radius and h be the height of the right circular cylinder and right circular cone.

Volume of the right circular cylinder= πr²h

Volume of the right circular cone= 1/3 πr²h

Ratio of volume of a cone to the volume of a cylinder

= 1/3

Therefore, Ratio of the volume of a right circular cone to the volume of a cylinder with same height and base radius= 1/3

(b) Volume of the paraboloid = π/2r²h

Ratio of volume of a paraboloid to the ratio of volume of a cylinder

=1/2 πr²h/ πr²h

= 1/2

Therefore, Ratio of the volume of a paraboloid to the volume of a cylinder= 1/2

(c)Volume of a sphere= 4/3πr³

Given: Height of a cylinder h=2r (the diameter of the sphere)

Volume of a cylinder = 2πr³

Ratio of volume of a sphere to the volume of a cylinder

= 4/3πr³/ 2πr³

= 4/6

Therefore, Ratio of the volume of a sphere and cylinder= 4/6

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Complete question:

(a) Determine the ratio of the volume of a (right circular) cone to the volume of a cylinder with the same height and base radius:

First you will need to determine the equation of the line which rotates to generate the cone.)

b) Determine the ratio of the volume of a paraboloid (a parabola rotated about the y axis) to the volume of a cylinder with the same height and base radius:

(c) Archimedes was particularly pleased when he determined the ratio of the volumes of a sphere and cylinder. Determine the ratio of the volume of a sphere to the volume of a cylinder having the same radius, and having height the same as the diameter of the sphere:

Answer:

13 3/4

Step-by-step explanation:

5+8 = 13

1/2 = 2/4

2/4+1/4 = 3/4

Graph 2

It is the graph with the line on the positive Y-Axis as the equation is ended with +3

Answer:

D. Nonlinear

Step-by-step explanation:

y = -5x^2 - 14  is a parabola.

Linear lines are straight lines.

A parabola is not a straight line.

The missing variables of the line transversal using similarity ratio are;

x = 10

MT = 14

UP = 23

When two parallel lines crossed by a transversal, they formed same-side interior angles and their sum is equal to 180 degrees. As the sum of the same side interior angles is 180 degrees therefore the angles are supplementary.

Now, from the diagram, using the concept of similarity ratio, we can say that;

2/3 = (x + 2)/(x + 8)

Cross multiply to get;

2(x + 8) = 3(x + 2)

2x + 16 = 3x + 6

x = 10

Thus;

MT = (10 + 2) + 2

MT = 14

UP = (12 + 8) + 3

UP = 23

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Answer:

Step-by-step explanation:

Multiply x*x, then X*2, then -6*2, lastly -6*x. So in other words multiply all of the factors. pay close attention to the + and - negative signs.

Answer: [tex]x^{2}[/tex]+2x-6x+2x

Simplify: [tex]x^{2}[/tex]-4x+2x

The problem is the multiplication with exponent or scientific notation kind of problem.

Scientific notation is a way of writing a large number or small number with many digits in a simpler form using the power of 10.

For example, 30,000 can be written as 3 × 10⁴.

Here, the problem is defined as multiplying the expression 5 × 10³ with some number to get the expression 5 × 10⁶.

Let x be the number that is multiplied.

(5 × 10³) x = 5 × 10⁶

x = (5 × 10⁶) / (5 × 10³)

x = 10⁶ / 10³

x = 10⁶⁻³ = 10³

So here we are using the scientific notation to solve the whole problem and the answer itself is in the scientific notation.

Hence the given problem is a Multiplication of numbers in scientific notation kind of problem.

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The square root of zero is a counterexample of the statement, so it is false.

Here we have the following statement about square roots:

"the square root of a number will always have two outcomes One is positive and the other is negative."

This seems to be true because:

-2*-2 = 2*2 = 4

So √4 = 2 and -2

But, particularly the square root of zero is:

√0 = 0

So here we have only one outcome that is neither positive nor negative, then the statement is false.

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On solving the provided question, we can say that the probability of the red die rolling is 16.67% probability = 0.1667

A branch of mathematics called probability theory determines the chance that an event will occur or that a statement is true. A probability is a number between 0 and 1, where 1 denotes certainty and about 0 denotes how probable an event is to occur. The possibility or likelihood that a specific event will occur is expressed numerically as a probability. Probabilities can also be expressed as percentages from 0% to 100% or as numbers between 0 and 1. the proportion of occurrences among all equally likely alternatives that lead to a certain event relative to all possible outcomes.

red die, there are 3 numbers greater than 3 out of 6 numbers

Probability (A) = 3/6 = 1/2.

green die, there are 2 numbers less than 3 out of 6 numbers

Probability (B) = 2/6 = 1/3.

events are independent

P(A and B) = [tex]P(A)P(B) = 1/2 X 1/3 = 1/6 = 0.1667[/tex][tex]P(A)P(B) = 1/2 X 1/3 = 1/6 = 0.1667.[/tex]

16.67% probability = 0.1667

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The probability of flipping heads, spinning an odd number, and then flipping tails is 1/8.

The probability of flipping heads, spinning an odd number, and then flipping tails is given by the product of the individual probabilities of each event.

The probability of flipping heads is 1/2,

the probability of spinning an odd number is 2/4 or 1/2, and

the probability of flipping tails is 1/2.

So, the probability of flipping heads, spinning an odd number, and then flipping tails is:

1/2 * 1/2 * 1/2 = 1/8

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Answer:

6/55

Step-by-step explanation:

2/5 ÷ 3 2/3

3 2/3 = 11/3

2/5 ÷ 11/3

= 2/5 x 3/11

= 6/55

So, the answer is 6/55

Answer:

he would go to the barber shop 21 times in 2 years

Step-by-step explanation:

divide 4 by 52 and then multiply by 2

Answer:

26

Step-by-step explanation:

52÷4 = 13 times a year

therefore, for two years

13 × 2 = 26

The triangle with sides 44, 73, and 86 is an obtuse triangle.

The Pythagorean Theorem states that the square of the length of the hypotenuse (the side opposite the right angle) in a right triangle is equal to the sum of the squares of the lengths of the other two sides, can be used to determine whether the triangle is right, acute, or obtuse.

In an acute triangle, the square of the hypotenuse length is less than the sum of the squares of the other two sides; in an obtuse triangle, the square of the hypotenuse length is greater than the sum of the squares of the other two sides.

Begin by calculating the square of each side:

[tex]44^2 = 1936[/tex]

[tex]73^2 = 5329[/tex]

[tex]86^2 = 7396[/tex]

Let us now see if the triangle fulfils the Pythagorean Theorem:

1936 + 5329 = 7265

We know the triangle is not obtuse because 7265 is less than 7396.

1936 + 7396 = 9332

We know the triangle is not acute because 9332 is greater than 5329.

5329 + 7396 = 12725

We know the triangle is obtuse because 12725 is greater than 7265 but less than 9332.

As a result, the triangle with sides 44, 73, and 86 is obtuse.

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The volume of the solid is equal to one third of the area of the base times the height. Therefore, the volume of the tetrahedron is equal to [tex](1/3)*(a^2)*h[/tex].

The volume of a pyramid (or tetrahedron) is equal to one third of the area of the base times the height. Therefore, if we were given a pyramid with a base that is an equilateral triangle with side a and a height of h, then the volume of the solid can be calculated by using the formula [tex](1/3)*(a^2)*h[/tex]. This is because an equilateral triangle has sides of equal length and all of its angles are equal to 60°. Since the area of an equilateral triangle is equal to [tex](a^2)*√3/4[/tex], then the volume of the solid can be calculated by multiplying the area of the base by one third and then multiplying it by the height of the pyramid, which is [tex](1/3)*(a^2)*√3/4*h[/tex]. The final result is the volume of the solid, which is [tex](1/3)*(a^2)*h[/tex].

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The best definition of the term mirror line is "A mirror line is the line over which an object in the coordinate plane is reflected". So option A is correct.

A form or item is divided into two equal and symmetrical portions by a line of symmetry. Because it divides the figure symmetrically and the separated portions resemble mirror images of one another, we also refer to this line as the axis of symmetry or the mirror line.

Given options,

A. A mirror line is the line over which an object in the coordinate plane is reflected.

Yes this statement is according to definition of mirror line.

B. A mirror line is a line in the plane that is units away from the y-axis.

no its is not like that so it is incorrect option.

C. A mirror line is another name for the line of translation. no translation is a different concept so it also incorrect.

D. A mirror line is always a diagonal line in the plane that divides it into eight sections. it is also not correct.

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Answer: 18

Step-by-step explanation: 20 - 2 = 18

The average rate of change of life expectancy between the ages of 50 and 60 will be 0.88.

It is the average amount by which the function varied per unit throughout that time period. It is calculated using the gradient of the line linking the interval's ends on the graph depicting the function.

Average rate = [f(x₂) - f(x₁)] / [x₂ - x₁]

The graph on the right shows the remaining life expectancy, E, in years for females of age x.

Then the average rate of change is given as,

Average rate = (32.8 - 24) / (60 - 50)

Average rate = 8.8 / 10

Average rate = 0.88

The average rate of change of life expectancy between the ages of 50 and 60 will be 0.88.

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a) Type of research hypothesis is tested in this study is causal RH

b) Type of design is being used in this study is non-experiment

c) Type of design is being used in this study is within-subjects design

d) No, the design used in this study cannot provide an appropriate test of the research hypothesis.

(a) The research hypothesis being tested in this study is a causal hypothesis. The company president believes that the type of music listened to can predict production line output.

(b) The type of design being used in this study is a non-experiment. The researcher is not manipulating the type of music listened to; instead, the plant is naturally exposed to either country or classical music.

(c) The design being used in this study is within-subjects design, as the same group of individuals is exposed to both types of music. It is also a repeated measures design, as the same individuals are measured twice (once under country music and once under classical music).

(d) No, the design used in this study cannot provide an appropriate test of the research hypothesis. Since the researcher is not manipulating the type of music listened to, it is possible that other variables could be affecting the production line output, such as different environmental conditions on each week, or different levels of motivation.

Therefore, it is difficult to determine if any differences in production line output are actually due to the type of music listened to. A true experiment with random assignment of workers to the two music conditions would provide a better test of the research hypothesis.

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Answer:

37.8387 pounds of the 22% alloy copper and 13.1612 pounds of the 53% alloy copper must be used.

Step-by-step explanation:

Let x represent the amount of 22% copper needed.

Therefore, 51-x represents the amount of 53% copper needed.

Therefore, we can write

(22% * x) + (53% * (51-x)) = 30% * (51)

⇒0.22x + 0.53(51-x) = 0.3(51)

⇒ x = 37.8387

Thus, x =37.8387 and 51-x = 13.1612

Answer:

Step-by-step explanation:

Let's call the weight of each container "w". We can set up two equations based on the information given:

Equation 1: 3w = 70.8 (the weight of 3 containers holding 9 gallons)

Equation 2: 5w = 118.0 (the weight of 5 containers holding 15 gallons)

To solve for "w", we can first solve Equation 1 for "w":

3w = 70.8

w = 70.8/3

w = 23.6

Now we can substitute this value of "w" into Equation 2 and solve for the total weight of 5 containers:

5w = 118.0

5(23.6) = 118.0

So each container weighs 23.6 pounds.

Answer: B

Step-by-step explanation: The table represents a linear function because the graph shows a constant rate of change.

Answer:

y=-1

x=-1

Step-by-step explanation:

(a) The max speed of Gregory is, [tex]v_{max} =\frac{32}{4} =8s[/tex]

(b) distance covered in additional z seconds is [tex]distance= 4zmeter[/tex]

(c)[tex]d(x)=30m+4(x-7s)[/tex]

Velocity is defined as the rate of change position of the object with respect to the time and frame of reference.

Gregory runs a 100-meter race. 5 seconds after the race started he is 30 meters from the starting line and reaches his max speed.

(a)The max speed covered by Gregory is ,

For constant speed, we know,

[tex]v=\frac{distance}{time taken}[/tex]

distance= 62m-30m=32m.

And the time take to reach 62m will be

time =9s-5s=4s

So, Gregory's max speed is,

[tex]v_{max} =\frac{32}{4} =8s[/tex]

(b) Suppose Gregory runs for an additional z seconds after reaching his max speed,

As the velocity of Gregory's is [tex]v_{max}[/tex], the distance covered by him is,

[tex]distance=v_{max}*zs[/tex]

[tex]distance= 4zmeter[/tex]

(c) At time 5+ z seconds the distance will be the30

meters he covers in the first part of the race plus the distance he traveled at constant speed. this is:

[tex]distance=v_{max}*z+30\\distance=4\frac{m}{s} *z s[/tex]

At time x ( x greater or equal to 5 seconds) the distance will be the 30 meters he covers in the first part of the race plus the distance he traveled at constant speed. this is:

[tex]d(x)=30m+v_{max}*(x-5s)\\ d(x)=30m+4(x-7s)[/tex]

Hence,(a)The max speed of Gregory is, [tex]v_{max} =\frac{32}{4} =8s[/tex]

(b) distance covered in additional z seconds is [tex]distance= 4zmeter[/tex]

(c)[tex]d(x)=30m+4(x-7s)[/tex]

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d.) T distribution's mean=0 and standard deviation=1 is not true. Instead, the t distribution has a mean of 0 and a standard deviation that varies based on the sample size and degrees of freedom

The t distribution is not similar to the z distribution in terms of its standard deviation. Unlike the standard normal distribution (z distribution), which has a mean of 0 and a standard deviation of 1, the t distribution has a mean of 0, but its standard deviation varies depending on the sample size. Specifically, the t distribution has heavier tails than the z distribution, which means it has more spread in the distribution and more extreme values are more likely to occur.

The t distribution's mean=0 and standard deviation=1 is not true, hence the proper response is d. The t distribution, on the other hand, has a mean of zero and a standard deviation that varies according to the sample size and degrees of freedom.

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3x

x equals ur mom so udhdhddhehehrhrhrhrrruur mom is ur mome

The answer is (a) -25. The covariance is negative, indicating that the December snowfall and temperature in Syracuse NY have an inverse relationship. Snowfall, in particular, tends to decrease as temperatures rise. Covariance units are the product of the units of the two variables, which in this case are in2 and (degrees F)2, so covariance units are degree inches.

We are given the following details:

Correlation coefficient between December snowfall and temperature in Syracuse, New York: -0.5

December snowfall variation (S): 100 in2

Temperature variation in December (T): 25 (degrees F)2

We are asked to calculate the correlation between December snowfall and temperature in degrees inches.

Cov(S,T) can be calculated using the covariance formula:

Corr(S,T) = Cov(S,T) * sqrt(Var(S)) * sqrt(Var(T))

Plugging in the values from the problem yields:

Cov(S,T) = (-0.5) * sqrt(100 in2) * sqrt(25 (degrees F)2) = (-0.5) * 10 in * 5 degrees F = -25 degree inches

As a result, the answer is (a) -25. The covariance is negative, indicating that the December snowfall and temperature in Syracuse NY have an inverse relationship.

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Sarah spend $161.24 before two weeks.

In mathematics, the middle value—which is determined by dividing the sum of all the values by the total number of values—is the average value in a set of numbers. To calculate the average of a set of data, add up all the values and divide the result by the total number of values.

Given:

Sarah spends an average of $64.11 per week.

She spent $53.22 last week, and $64.11 this week.

As, 1 month = 4.34524 weeks

So, before two weeks she spends

64.11 = (64.11 + 53.22 +x )/ 4.34524

278.5733364 = 117.33 + x

x= 161.24

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Answer:

80

Step-by-step explanation:

16/20 —> 80/100

or

16/20 = 8/10 = 80%

Answer: 58 degrees

Step-by-step explanation: