Need help on my math homework

Answer:

3

Step-by-step explanation:

do the brackets first

(5+3) = 8

24÷8=3

so the answer is 3

Note that the transformation for the above vertices are given as follows.

From the given graph, we can determine the transformations as follows:

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Full Question:

Although part of your question is missing, you might be referring to this full question: See attached image.

Answer:

The correct numerical expression using PEDMAS for "subtract the sum of 2 and 9 from the product of 4 and 3" is:

4 x 3 - (2 + 9)

Using the order of operations, first, we perform the addition inside the parentheses, then we multiply 4 and 3, and finally, we subtract the result of the sum from the product:

= 4 x 3 - 11

= 12 - 11

= 1

Therefore, the correct numerical expression is (4 x 3) - (2 + 9) = 1.

Step-by-step explanation:

Answer:

Circumfrance= 21.991

area= 38.48

Step-by-step explanation:

2piR

R=3.5

:)

Answer:

Step-by-step explanation:

To write the ratio of baking soda to salt, we need to compare the amount of baking soda to the amount of salt in the recipe.

The recipe uses 3/4 teaspoon of baking soda and 3 teaspoons of salt, so the ratio of baking soda to salt is:

3/4 : 3

To simplify this ratio, we can divide both numbers by the greatest common factor (GCF) of 3 and 4, which is 1.

3/4 divided by 1 = 3/4

3 divided by 1 = 3

So the simplified ratio of baking soda to salt is:

3/4 : 3 = 3: 12

To find the value of the ratio, we can divide both the numerator and denominator by 3:

3/3 : 12/3 = 1: 4

Therefore, the value of the ratio of baking soda to salt is 1:4.

This is the simplified ratio of lengths DE:EF as (2/√(29))√(34) : 1.

A ratio is a relationship between two or more quantities that indicates how many times one quantity is contained in another. It is a way of comparing quantities of the same kind, such as lengths, areas, volumes, or numbers. A ratio is usually expressed as a fraction or a colon (:). Ratios can be simplified by dividing both terms of the ratio by their greatest common factor (GCF). Ratios are used in many fields such as mathematics, finance, science, engineering, and statistics, among others. They are used to compare different quantities, to express proportions or rates, and to solve various mathematical problems.

Here,

We can use the distance formula to find the lengths DE and EF, and then calculate their ratio:

Length DE = √[(xE - xD)² + (yE - yD)²]

= √[(10 - 4)² + (15 - 4)²]

= √(6² + 11²)

= √(136)

= 2√(34)

Length EF = √[(xF - xE)² + (yF - yE)²]

= √[(12 - 10)² + (20 - 15)²]

= √(2² + 5²)

= √(29)

Therefore, the ratio of lengths DE:EF is:

DE:EF = (2√(34)) : (√(29))

We can simplify this ratio by dividing both sides by √(29):

DE:EF = (2√(34))/√(29) : (√(29))/√(29)

= (2/√(29))√(34) : 1

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Answer:

1047

Step-by-step explanation:

a_n = a_1 + (n - 1)d

a_19 = 243

a_11 = 147

243 = a_1 + (19 - 1)d

147 = a_1 + (11 - 1)d

243 = a_1 + 18d

147 = a_1 + 10d

a_1 = 243 - 18d

a_1 = 147 - 10d

243 - 18d = 147 - 10d

-8d = -96

d = 12

a_1 = 147 - 10d

a_1 = 147 - 10(12)

a_1 = 27

The first term is 27. The common difference is 12.

a_86 = a_1 + (n - 1)d

a_86 = 27 + 85(12)

a_86 = 1047

Thus, each book has an 8-inch height.

What are some math examples of volume?

The quantity of space taken up by a three-dimensional object can also be used to describe volume. By determining the number of units cubes it contains, the volume of such a solid like such a cube or cuboid can be determined.

Get the volume of a single book in cubic centimeters to get things started. We can accomplish this by multiplying a book's length, width, and height:

Volume of one book = 6 inches x 3/4 inches x height

Volume of one book = 4.5 cubic inches x height

Since the 12 books are all the same size, their combined volume is:

Total volume of books = 12 books x Volume of one book

Total volume of books = 12 books x 4.5 cubic inches x height

Total volume of books = 54 cubic inches x height

Since we are aware that the case has a total volume of 432 cubic inches, we can construct the following equation:

Total volume of case = Total volume of books

432 cubic inches = 54 cubic inches x height

When we solve for height, we obtain:

height = 432 cubic inches / 54 cubic inches

height = 8 inches

Thus, each book has a height of 8 inches.

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The center of the hyperbola is the midpoint between the vertices, which is (-2,6).

The distance between the center and each vertex is 3, so the distance between the center and each focus is c = 7.

The distance between each vertex and focus is a = 4.

The equation of the hyperbola with center (h,k) is:

(x - h)^2 / a^2 - (y - k)^2 / b^2 = 1

where b^2 = c^2 - a^2.

Plugging in the values we have:

- Center: (h,k) = (-2,6)

- a = 4

- c = 7

- b^2 = c^2 - a^2 = 49 - 16 = 33

So the equation of the hyperbola is:

(x + 2)^2 / 16 - (y - 6)^2 / 33 = 1

The mean is the most appropriate measure of center for the given data. While the median and mode were also calculated, the mean provides the best representation of the data's central tendency. The geometric mean was not applicable in this case.

Option A) Mean: To calculate the mean, we add up all the values and divide by the total number of values.

Mean = (20 + 6 + 42 + 13 + 15 + 10 + 9 + 12 + 12) / 9

Mean = 16.222

Option B) Median: To calculate the median, we need to arrange the values in order and find the middle value.

After arranging the values in ascending order: 6, 9, 10, 12, 12, 13, 15, 20, 42

The median is 12.

Option C) Mode: To calculate the mode, we need to find the most frequently occurring value. In this case, there is no value that occurs more than once, so there is no mode.

Option D) Geometric Mean: The geometric mean is used to calculate the average rate of change or growth. It is not suitable for this data set.

Therefore, option A) mean is the most appropriate measure of center for this data.

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Complete question:

The most appropriate measure of center for this data is the.

20, 6, 42, 13, 15, 10, 9, 12, 12

A) mean

B) median

C) mode

D) geometric mean

Answer:

median, A, 65

Step-by-step explanation:

.....

The rate at which the volume of water in the tank is changing is 58π(dr/dt).

To find the rate at which the volume of water in the tank is changing if the rate at which the height is decreasing is 8 centimeters per minute when the height is 4 meters, we need to use the formula for the volume of a cylinder, which is given by:

V = πr²hwhere V is the volume of the cylinder, r is the radius, and h is the height.

We also need to differentiate the formula for the volume of a cylinder with respect to time to get an equation for the rate of change of the volume of the cylinder. Differentiating the formula for the volume of a cylinder with respect to time, we get:

dV/dt = πr²dh/dt + 2πrhdr/dt

where dV/dt is the rate of change of the volume of the cylinder, dh/dt is the rate of change of the height of the cylinder, and dr/dt is the rate of change of the radius of the cylinder.

Substituting the given values into the formula and simplifying, we get:

dV/dt = π(5²)(-8/100) + 2π(5)(6)(dr/dt) = -2π + 60π(dr/dt) = 58π(dr/dt)

Therefore, the changes in water volume in the tank is 58π(dr/dt).

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The formula for the circumference of a circle is C = 2πr, where "C" is the circumference, "π" is pi (approximately equal to 3.14), and "r" is the radius.

Given that the radius of the circle is 5 inches, we can substitute this value into the formula to find the circumference:

C = 2πr

C = 2π(5)

C = 10π

Therefore, the circumference of the circle is 10π inches.

The arithmetic equation that correctly describes the following real-world situation is (s x 10) ÷ 5 = 225.

What is arithmetic?

Arithmetic is an elementary part of mathematics that consists of the study of the properties of the traditional operations on numbers—addition, subtraction, multiplication, division, exponentiation, and extraction of roots.

Here, we have

Given: 10 pieces of candy are given to s students from a bag of candy containing 225 pieces. There are 5 pieces left over.

We have to find the equation that correctly describes the following real-world situation.

(s x 10) ÷ 5 = 225

2s = 225

s = 112.5

Hence, the value of s is 112.5

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Answer: ( s x 10 ) `-. = 225

Step-by-step explanation:

Answer:If (2t+1)is a factor then t=2−1 must be one of the zeroes of the given polynomial. Substituting in the given equation.

q((2−1))=4(2−1)3+4(2−1)2−(2−1)−1=4(8−1)+4(41)+(21)−1=(2−1)+1+(21)−1=0

Hence(2t+1) is a common factor of q(t)

Step-by-step explanation:

Answer: c

Step-by-step explanation:

1) The time it will take for both to have cleaned the same number of rows is: 1 minute

2) The number of rows cleaned by then is: 16 rows

We are told that Volunteers from the Band Booster Club have already cleaned 5 rows of bleachers and will continue to clean at a rate of 3 rows per minute. If the number of minutes is x, then the equation here is:

3x + 5

Similarly, the leadership class has completed 6 rows and will continue working at 2 rows per minute. If the number of minutes is x, then the equation here is:

2x + 6

The point at which they have cleaned the same number of rows will be:

3x + 5 = 2x + 6

3x - 2x = 6 - 5

x = 1 minute

Thus, after 1 minute they would have cleaned 8 + 8 = 16 rows of bleachers

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The unknown angle in the triangle is as follows;

m∠S = 38 degrees

A triangle is a polygon with three sides. The sum of angles in a triangle is 180 degrees.

In the triangle QRS,

m∠Q = 4m∠R

m∠R = 3 / 4 m∠S

Therefore, let's find the angle m∠S in the triangle as follows:

Therefore,

m∠Q + m∠R + m∠S = 180°

let

m∠R = x

4x + x + 4 / 3 x = 180

5x + 4 / 3 x  = 180

15x + 4x / 3 = 180

19x / 3 = 180

19x = 180 × 3

19x = 540

x = 540 / 19

x = 28.42

Therefore,

m∠S = 4 / 3 (28.42)

m∠S = 37.8947368421

m∠S = 38 degrees

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Answer: What is the measure of ∠ D?

By using the angle sum property of quadrilateral, we get the measure of angle ∠D is 76.765°.

Step-by-step explanation:

Answer:

1 and 19

Step-by-step explanation:

3(x-10)^2 = 3(x^2-20x+100) = 3x^2 - 60x + 300

If 3x^2 - 60x + 300 = 243, 3x^2 - 60x + 57 = 0

Divide by 3 to get x^2 - 20x + 19 = 0

use the quadratic equation (-b±√(b²-4ac))/(2a) to get

(20±√324)/2 = (20±18)/2 = 1 and 19

We can conclude after answering the presented question that Use the equation data to discover potential for process changes that might result in a reduction in the time necessary to perform the activity.

An equation in mathematics is a statement that states the equality of two expressions. An equation is made up of two sides that are separated by an algebraic equation (=). For example, the argument "2x + 3 = 9" asserts that the phrase "2x + 3" equals the number "9". The purpose of equation solving is to determine the value or readings of the variable(s) that will allow the equation to be true. Equations can be simple or complicated, regular or nonlinear, and include one or more elements. In the calculation "x2 + 2x - 3 = 0," for example, the variable x is raised to the second power. Lines are utilised in many different areas of mathematics, such as algebra, calculus, and geometry.

The procedures that a manufacturing organisation might take to undertake a time study analysis are as follows:

List the tasks performed by the workers and describe what constitutes a complete unit of labour.

Choose a representative sample of employees to observe. The sample size should be high enough to be statistically significant, but not so large that observing all workers becomes unfeasible.

Use the data to discover potential for process changes that might result in a reduction in the time necessary to perform the activity.

By doing a time study analysis, the manufacturing organisation may acquire useful insights into their workers' productivity and find chances for process changes that will help them fulfil the rising demand for their products.

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Answer:

After 16 years Mr. Jibril will be twice as old as his son.

Step-by-step explanation:

t - age Mr. Jibril

s - son age

t=4s (father is 4 times older than son)

t-4=7(s-4) (4 years ago they both have 4 year old less and father was 7 times older than son)

t=7s-28+4

t=7s-24

7s-24=4s

3s=24

s=8

t=32

x- years after Mr. Jibril will be twice as old as his son.

32+x=2(8+x)

32+x=16+2x

16=x

x=16

The 99% confidence interval for the population proportion is (0.257, 0.583).

(a) The point estimate of the population proportion of plants alive after the first month in the more humid environment is:

point estimate = x/n = 21/50 = 0.42

So, the point estimate is 0.42.

(b) To find the 95% confidence interval for the population proportion, we can use the formula:

confidence interval = point estimate ± z√(point estimate(1-point estimate)/n)

where z is the z-score corresponding to the desired confidence level, n is the sample size, and √ represents the square root.

For a 95% confidence level, z = 1.96 (from a standard normal distribution table).

Plugging in the values, we get:

confidence interval = 0.42 ± 1.96√(0.42(1-0.42)/50)

= 0.42 ± 0.127

= (0.293, 0.547)

So, the 95% confidence interval for the population proportion is (0.293, 0.547).

(c) To find the 99% confidence interval for the population proportion, we can use the same formula but with a different z-score.

For a 99% confidence level, z = 2.58 (from a standard normal distribution table).

Plugging in the values, we get:

confidence interval = 0.42 ± 2.58√(0.42(1-0.42)/50)

= 0.42 ± 0.163

= (0.257, 0.583)

So, the 99% confidence interval for the population proportion is (0.257, 0.583).

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To find Martin's average total income, we need to add his average weekly wage to his average weekly tips:

$240 (weekly wage) + $356 (weekly tips) = $596 (average total income)

Therefore, Martin's average total income is $596 per week.

Answer:

the answer is 3,9

Step-by-step explanation:

-3x+2y=9

3(x+y=12)

-3x+2y=9

3x+3y=36

5y=45

_ __

5 5

y=9

x+y=12

x+9=12

-9 -9

_______

x=3

The answer of the given question based on the graph  transformations  is  option (c): (x-4, y+0), 90° counterclockwise rotation, reflection over the x-axis.

Reflection is a transformation that flips an object over a line, plane, or point. The line, plane, or point is called the "line of reflection", the "plane of reflection", or the "point of reflection", respectively. Reflection is a fundamental concept in geometry, and it has applications in various fields of mathematics, physics, and engineering. It is often used in symmetry analysis, transformation geometry, and computer graphics.

The series of transformations that would carry the rectangle onto itself is option (c): (x-4, y+0), 90° counterclockwise rotation, reflection over the x-axis.

To see why, we can analyze each transformation and its effect on the rectangle:

(x-4, y+0) translates the rectangle left by 4 units.

90° counterclockwise rotation preserves the right angles and parallel sides of the rectangle.

Reflection over the x-axis preserves the right angles of the rectangle and also preserves the orientation of its parallel sides.

Therefore, the final image after all three transformations would be congruent to the original rectangle, i.e., the rectangle would be carried onto itself.

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Answer:

x1 ≈ 0,84; x2 ≈ 4,16

Step-by-step explanation:

Find the discriminant and then both values of x according to the formulas (I added a photo of my solution)

The the speed of a car that travels the given distance in 5 seconds from the information is 65.6 mph.

Speed and time are two fundamental concepts in physics and mathematics that are often used together to describe the motion of objects.

Speed refers to how fast an object is moving, and is typically measured in units of distance per unit of time, such as meters per second (m/s) or miles per hour (mph). Speed can be either constant, meaning the object is moving at the same speed throughout its motion, or variable, meaning the object's speed changes over time.

Given that the speed R varies inversely with the time T

R = 41 mph T =  8 seconds

The distance can be calculated as( speed * time)

Distance = ( speed * time)

= 41 * 8 = 328miles

The total distance travel  can now bw seen as 328miles, the speed  of a car that travels the given distance in 5 seconds can now be calculated as

Speed =Distance / time.

= 328miles/ 5 seconds

= 65.6 mph.

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Answer:

a₅ = 11

Step-by-step explanation:

using the recursive rule [tex]a_{n}[/tex] = [tex]a_{n-1}[/tex] + 2 , with a₁ = 3 , then

a₂ = a₁ + 2 = 3 + 2 = 5

a₃ = a₂ + 2 = 5 + 2 = 7

a₄ = a₃ + 2 = 7 + 2 = 9

a₅ = a₄ + 2 = 9 + 2 = 11

Answer: x = -5, y = 1

Step-by-step explanation:

These are simultaneous equations

I will use the substitution method

BTW [1] means the top equation, and [2] the bottom equation

Rearrange [2] for x

-x = -4 + 9y

x = 4 - 9y

Substitute 4 - 9y into [1]

3(4 - 9y) - 2y = -17

Expand the bracket

12 - 27y - 2y = -17

Simplify

12 - 29y = -17

Rarrange for y

12 = 29y - 17

29y = 12 + 17 = 29

Now substitute y into either equation to solve for x

I will use [2] as it looks easier

-x - 9(1) = -4

Expand the bracket

-x -9 = -4

-x = 5

Now lets substitute x and y into [1] to check our answer

3(-5) - 2(1) = -17

-15 - 2 = -17