Can someone help me with this please???

Answer:

Please check the explanation.

Step-by-step explanation:

We know that when y varies directly with x, we get the equation

y ∝ x

y = kx

k = y/x

where 'k' is called the 'constant of direct variation'.

We are given that x = -2 and y = -2

Thus,

The equation is:

y = kx

substituting x = -2 and y = -2

-2 = k(-2)

-2 = -2k

We can further simplify the equation to determine the value of 'k'

so

dividing the equation by -2

-2/-2 = -2k/-2

1 = k

Therefore, the value of k = 1

Thus, the equation becomes

y = kx

substituting k = 1 in the equation

y = (1)x

y = x

Therefore, an equation that relates x and y is:

y = x

Step-by-step explanation:

The line representing the equation 7x1 + 4x2 = 28 goes through the points (4,0) and (0,7).

Answer:

x = 25

Step-by-step explanation:

The measure of angle A is 108°

An angle is formed when two straight lines or rays meet at a common endpoint.

Supplementary angles are those angles that sum up to 180 degrees.

Given that angle A and angle B are supplementary angle

∠A=(7x+10)°

∠B=(7x−26)°

(7x+10)° + (7x−26)° =180°

14x - 16° =180°

14x =196°

x= 14°

∠A=(7x+10)°

∠A=(7(14) +10)°

∠A= 108°

Thus the measure of angle A is 108°

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The correct answer is d. 56.

When computing a correlation coefficient, the degrees of freedom (df) is calculated as (n-2), where n is the sample size. In this case, we are given that df = 55.

Substituting df = 55 into the formula, we get:

55 = n - 2

Adding 2 to both sides, we get:

n = 57

Therefore, the sample size must be 57 in order to have 55 degrees of freedom when computing a correlation coefficient.
Hi! When computing a correlation coefficient with 55 degrees of freedom, your sample size must be 57 (Option c).

Here's the step-by-step explanation:
1. Recall that the formula to find degrees of freedom (df) in correlation is df = n - 2, where n is the sample size.
2. In this case, the degrees of freedom is given as 55.
3. To find the sample size (n), you'll need to rearrange the formula: n = df + 2.
4. Substitute the given degrees of freedom into the formula: n = 55 + 2.
5. Solve for n: n = 57.

Therefore, when computing a correlation coefficient with 55 degrees of freedom, your sample size must be 57.

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Mathematics is a fundamental subject in education that is essential in the development of an individual’s critical thinking and problem-solving skills. It is one of the primary subjects that are taught in elementary schools and must be taught appropriately for children to understand and gain the required skills. One true statement about mathematics teaching in elementary schools is that it should be student-centered.

Teachers should focus on the child's understanding, individual learning abilities and styles, and progress.The learning experience should not be centered on the teacher but on the students. Teachers should also make the subject engaging and interactive to enable students to grasp the content easily and maintain their interest in the subject. Besides, teachers should develop a personalized learning approach that allows students to learn and understand the subject at their own pace while creating opportunities for individual and group learning. Through such learning approaches, students can develop the required mathematical concepts and competencies such as critical thinking, problem-solving, and decision-making skills that will be beneficial in their future endeavors.

In elementary schools, mathematics teaching should be student-centered. It should be engaging and interactive to enable students to grasp the content easily and maintain their interest in the subject.

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The probability that there will be exactly three pink balls, and exactly 2 green balls among the seven balls drawn is 0.033 or 3.3%.

We need to consider the probabilities of each event happening to calculate the probability of drawing exactly three pink balls and exactly two green balls among the seven balls drawn with replacement

The probability of drawing a pink ball is 1/6 since there is one pink ball out of a total of six balls in the bin. Similarly, the probability of drawing a green ball is 4/6 since there are four green balls. The probability of drawing any specific combination of balls is the product of their individual probabilities.

For exactly three pink balls and two green balls, we can arrange them in different orders. The number of ways to choose 3 out of 7 positions for pink balls is given by the combination formula:

C(7,3) = 7! / (3! × 4!) = 35.

Similarly, the number of ways to choose 2 out of the remaining 4 positions for green balls is C(4,2) = 4! / (2! × 2!) = 6.

Therefore, the probability of this specific combination occurring is (1/6)³ × (4/6)² × 35 × 6 = 0.0327, which is approximately 0.033 or 3.3%.

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1) -11 + 26 = 15

2) 2 - (-3) = 5

3) 11 + (-4) = 7

4) 5 + -8 = -3

5) -2 + 3 = 1

6) 8 - 12 = -4

Answer:

$5

Step-by-step explanation:

The cost of each mug  depends on the number of mugs that are ordered and is modeled by :

\(y =0.0001x^2+ 0.1x + 30\) ...(1)

We need to find the minimum cost of each mug.

For minimum cost, dy/dx = 0

So,

\(\dfrac{d(0.0001x^2- 0.1x + 30)}{dx}=0\\\\2x(0.0001)-0.1=0\\\\0.0002x=0.1\\\\x=\dfrac{0.1}{0.0002}\\\\x=500\)

Put the value of x in equation (1).

\(y =0.0001(500)^2- 0.1(500) + 30\\\\y=5\)

So, the minimum cost of each mug is $5.

The dot product of the vectors a and b, which have a magnitude of 4 and 7 respectively and an angle of 150 degrees between them, is approximately -24.1442.

To calculate the dot product of two vectors, a and b, you can use the formula:

a · b = ||a|| ||b|| cos(θ),

where a · b represents the dot product, ||a|| and ||b|| represent the magnitudes (or lengths) of the vectors a and b, respectively, and θ is the angle between the two vectors.

In this case, we have two vectors, a and b, with given magnitudes and an angle of 150 degrees between them. Let's substitute the values into the formula:

a · b = ||a|| ||b|| cos(θ)

= 4 * 7 * cos(150°)

First, let's convert the angle from degrees to radians, since trigonometric functions typically work with radians. We have:

θ (in radians) = 150° * (π/180)

= 5π/6

Now, we can continue calculating the dot product:

a · b = 4 * 7 * cos(5π/6)

Using a calculator or computer software, we can evaluate the cosine function:

cos(5π/6) ≈ -0.86603

Substituting this value back into the formula, we get:

a · b ≈ 4 * 7 * (-0.86603)

≈ -24.1442

Therefore, the dot product of the vectors a and b, which have a magnitude of 4 and 7 respectively and an angle of 150 degrees between them, is approximately -24.1442.

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Answer:

Answer:

C. m4/n2    :))))

The solution of the given equation is -6 and 1.

A quadratic equation is an algebraic equation of the second degree in x. The quadratic equation in its standard form is ax² + bx + c = 0, where a and b are the coefficients, x is the variable, and c is the constant term.

Here, given equation:

  (x+2)(x+3) = 12

 x(x+3)+2(x+3) = 12

 x² + 3x + 2x + 6 = 12

 x² + 5x + 6 - 12 = 0

 x² + 5x - 6 = 0

 x² + 6x - x - 6 = 0

 x(x+6) -1(x+6) = 0

 (x+6)(x-1) = 0

Now, x + 6 = 0      or      x - 1 = 0

        x = -6           or      x = 1

Thus, the solution of the given equation is -6 and 1.

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18. ∆PQR =~ ∆RPA ( by SAS )

19. ∆DQR =~ ∆PQR ( by AAS )

20. ∆ARO =~ ∆PQO ( by AAS )

Answer:

8 and 25

Step-by-step explanation:

We can set up an equation to help solve this problem.

Let x represent the smaller number

x+(x+17)=33

2x+17=33

2x=16

x=8

The smaller number is 8

Add 17 to 8

The larger number is 25

Answer:

Smaller number:8 larger number:25

Step-by-step explanation:

25-8=17

25+8=33

You can also set up an equation to help things be easier.

sin(x) is a mathematical function that calculates the sine of angle x, where x is in radians.

In mathematics, angles are measured in radians or degrees. The symbol π represents the mathematical constant pi, which is approximately equal to 3.14159.

When we say π/2, it means half of the circumference of a circle, which corresponds to 90 degrees.

The inequality "π/2 < 0" suggests that π/2 is less than zero, implying that the angle of 90 degrees is negative. However, this is incorrect.

In the standard coordinate system, angles are measured counterclockwise from the positive x-axis.

Thus, π/2 or 90 degrees lies in the positive direction. The correct relationship should be "π/2 > 0" to indicate that the angle is greater than zero.

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Answer: B, C, and E

Step-by-step explanation:

The values must add up to 180 for it to be a triangle. X and Y especially need to add up to 120.

To solve for x at an angle, you must first understand what type of angle you are working with. If the angle is a right angle, you can use the Pythagorean theorem to solve for x. If the angle is an obtuse angle, you can use the law of cosines to solve for x. If the angle is an acute angle, you can use the law of sines to solve for x.

To solve for x at a right angle using the Pythagorean theorem, you must have the lengths of the two neighboring sides of the triangle. The sum of the squares of the two sides is equal to the square of the hypotenuse, according to the Pythagorean theorem. By rearranging the components and solving for x, this equation may be used to find x.

To use the law of cosines to solve for x at an obtuse angle, you must know the lengths of all three sides of the triangle. According to the law of cosines, the square of one side's length equals the sum of the squares of the other 2 sides minus twice the product of the other 2 sides multiplied by the cosine of the obtuse angle. You can use this equation to solve for x by rearranging the terms and solving for x.

To apply the law of sines to solve for x in an acute angle, you should first know the lengths of the triangle's two sides as well as the acute angle's measurement. According to the law of sines, the ratio of one side's length to the sine of the opposite angle equals the ratio of the other side's length to the sine of the acute angle. By rearranging the terms and solving for x, you may use this equation to solve for x.

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Answer:

Equation of the line is 3y = -5x + 8

Step-by-step explanation:

Slope:

\({ \bf{m = \frac{y _{2} - y _{1} }{x _{2} - x _{1} } }}\)

substitute:

\({ \sf{m = \frac{1 - 6}{1 - ( - 2)} }} \\ { \sf{m = - \frac{5}{3} }}\)

General equation of a line:

\({ \boxed{ \pmb{y = mx + b}}}\)

b is the y-intercept.

Consinder point (1, 1):

\({ \sf{1 = ( - \frac{5}{3} \times 1) + b}} \\ { \sf{b = \frac{8}{3} }}\)

Substitute:

\({ \sf{y = - \frac{5}{3} x + \frac{8}{3} }} \\ \\ { \sf{3y = - 5x + 8}}\)

There are a total of 2 x 2 = 4 instances where the two "hands" of an analog clock form a Right angle.

The two "hands" of an analog clock form a right angle at two specific times during a 12-hour period. The first occurrence is at 3:15, where the minute hand points to the 3 and the hour hand points to the 9, forming a right angle. The second occurrence is at 9:45, where the minute hand points to the 9 and the hour hand points to the 3, forming another right angle.

To determine how many times a right angle forms on the clock face each day, we need to consider both the AM and PM periods. In a 24-hour day, there are 12 hours in the AM (from 12:00 AM to 11:59 AM) and 12 hours in the PM (from 12:00 PM to 11:59 PM).

For each 12-hour period, there are two instances where the hands form a right angle. Therefore, in a full day, there are a total of 2 x 2 = 4 instances where the two "hands" of an analog clock form a right angle.

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The best answer would be 213.

Assuming that the sign denotes summation, we are adding from k=4 to k=9.

To get, we change k=4 to k=9.

We simplify obtaining,

To simplify means to make anything easier. In mathematics, simplifying an equation, fraction, or problem means taking it and making it simpler. Calculations and problem-solving techniques simplify the issue.

Summarizing mainly entails entering the values k=4, 5, 6, 7, 8, and 9 into the formula section 5K+3 and adding them all together.

So, the result is:

(5(4)+3)+(5(5) + 3) + (5(6) + 3) + (5(7) +3) + (5(8) + 3) + (5(9) + 3) 23+28+33 +38+43 + 48

= 213

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Yes, when dealing with a multi-value attribute with a variable number of values that need to be processed independently.

Yes, when dealing with a multi-value attribute with a variable number of values that need to be processed independently, it is recommended to consider creating a new dependent entity to represent the values. This can help to simplify the design and make it easier to manage and maintain. The new entity can be linked to the original entity through a relationship, allowing each value to be processed independently while still maintaining the integrity of the data. Overall, this approach can improve the efficiency and effectiveness of the system, making it easier to work with and providing better results for the end user.

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Answer:

width = 5 ft

Step-by-step explanation:

1.9 times of  width = length

1.9*w = 9.5 ft

1.9w = 9.5

Divide both sides by 1.9

w = 9.5/1.9

w = 5 ft

Answer:

1.9w=9.5

w=width

1.9(w)=9.5

1.9(5)=9.5

Width(w)=5

Answer:

B

Step-by-step explanation:

2x+3 is a factor of f(x) means that f(x) = (2x+3)* something else

to find the root or the zero:

2x+3 = 0 so 2x = -3; x= -3/2 so B is correct

Yes as if you work it out everytime 16 - 16 is going to. Give you the output of 0

Answer:

14/50

General Formulas and Concepts:

Math

Trigonometry

Step-by-step explanation:

Step 1: Define

sin∠C

Opposite Leg of ∠C = 14

Hypotenuse = 50

Step 2: Find

Answer:

14/50

Step-by-step explanation:

For angle C, 14 is the opposite leg. The hypotenuse is 50.

sin C = opp/hyp

sin C = 14/50

Answer: 14/50

Answer:

3

Step-by-step explanation:

3 * 2 1/4 = 6 3/4

The probability of selecting a three-digit number with the property that one digit is equal to the product of the other two is 1/90.

1/90

The probability of selecting a three-digit number with the property that one digit is equal to the product of the other two is 1/90. This is because there are only 9 possible digits (1, 2, 3, 4, 5, 6, 7, 8, 9) to choose from, and each of these digits can be multiplied by itself twice to give 9 possible combinations. Therefore, there are 9 three-digit numbers that satisfy the given condition, and these 9 numbers can be chosen from a total of 900 three-digit numbers (10 x 10 x 10 = 1000, minus the 100 numbers beginning with 0). Thus, the probability of selecting a three-digit number with the property that one digit is equal to the product of the other two is 9/900, which can be simplified to 1/90.

The probability of selecting a three-digit number with the property that one digit is equal to the product of the other two is 1/90.

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Theorem 9.11 states that the p-series ∑_(n=1)^∞ 1/n converges if p > 1 and diverges if p ≤ 1.
In the given series, we can see that each term is of the form n^3, which can be written as (n^p)^3 where p=1/3.

Since p=1/3 is less than or equal to 1, we can conclude that the series diverges by applying Theorem 9.11.

Therefore, the given series diverges.
Using Theorem 9.11, we can determine the convergence or divergence of the given p-series. This theorem states that a p-series ∑_(n=1)^∞ 1/n^p converges if p > 1 and diverges if p ≤ 1.

If you meant to write the series as 1/8 + 2/27 + 3/64 + 4/125 + ... (with terms of the form n/n^3), then it is a p-series with p = 3 > 1. In this case, according to Theorem 9.11, the series converges.

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The per capita income is the ratio of the total income to the population

The per capita income of the county is $30150.75

The given parameters are:

Population = 159.2 thousand

Land area = 1,536.7 square miles

Total income = $4.8 billion

The per capita income is then calculated as:

Per capita income (p) = total income /population

So, we have:

\(p = \frac{\$4.8\ billion}{159.2\ thousand}\)

Evaluate the quotient

\(p = \$30150.75\)

Hence, the per capita income of the county is $30150.75

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