3. 281,2. Explain how reliability and validity are related to each other. Be able to give and explain an example of a measure that is reliable but not valid.

Excessive punishment or negative reinforcement can harm a child's math achievement by creating fear, undermining confidence, and discouraging engagement with the subject. Positive discipline techniques and a supportive environment are crucial for fostering math success.

Excessive punishment or negative reinforcement as a discipline technique can have detrimental effects on a child's math achievement. When a child makes mistakes or struggles with math concepts, responding with punishment, criticism, or harsh consequences can create a negative association with math. This can lead to anxiety, fear, and a lack of motivation to engage with the subject.

Mathematics requires a growth mindset, where mistakes are seen as opportunities for learning and improvement. By punishing or negatively reinforcing a child's math mistakes, we discourage them from taking risks, trying new strategies, and seeking help when needed. It hampers their ability to develop problem-solving skills and critical thinking abilities.

Furthermore, negative discipline approaches can damage a child's self-esteem and confidence in their mathematical abilities. They may develop a belief that they are "bad at math" or incapable of improving, leading to a self-fulfilling prophecy where their performance suffers.

To support a child's math achievement, it is essential to employ positive discipline techniques. This includes providing constructive feedback, offering assistance and guidance, creating a safe and supportive learning environment, and promoting a growth mindset. Encouraging effort, perseverance, and celebrating small successes can foster a positive attitude towards math and enhance a child's mathematical abilities.

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Answer:

1 : 3

Step-by-step explanation:

1st Half: 9

2nd Half: 2(9)

Ratio = 2nd : 1st+2nd

9 : 9+2(9)

9 : 9 + 18

9 : 27

1 : 3

The P-value is less than a = 0.01, and they should conclude that there is a difference between the proportions.

The confidence interval for the difference between the proportion of male and female drivers who have received a speeding ticket is (0.011, 0.087), which means that we are 99% confident that the true value of the difference in proportions falls within this interval.

To test the null hypothesis H: PM = Pw versus H: PM ≠ Pw, we need to see if the confidence interval includes the null value of 0. If it does not, then we can reject the null hypothesis and conclude that there is a significant difference between the proportions of male and female drivers who have received a speeding ticket.

Since the confidence interval does not include the null value of 0, we can conclude that there is a significant difference between the proportions of male and female drivers who have received a speeding ticket. The P-value is less than a = 0.01, which means that the probability of obtaining a difference in proportions as extreme as or more extreme than the one observed, assuming that the null hypothesis is true, is less than 0.01. Therefore, we reject the null hypothesis and conclude that there is a statistically significant difference between the proportions of male and female drivers who have received a speeding ticket. The correct answer is c. The P-value is less than a = 0.01, and they should conclude that there is a difference between the proportions.

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Answer: The solutions of the absolute value equation are given by:

x = -41 and x = 49.

What is the absolute value function?

The absolute value function is defined by:

|x| = x, x >= 0.

|x| = -x, x < 0.

The absolute value function measures the distance of a point x to the origin, that is, the distance to x = 0. From this, we get that |x| = a can mean either that:

x = a, or;

x = -a.

In this problem, the equation is given by:

Hence:

0.2|x - 4| = 9

|x - 4| = 45

The first possible solution is:

x - 4 = 45

x = 49.

The second possible solution is:

-x + 4 = 45

-x = 41

x = -41.

Hence the solutions are x = -41 and x = 49.

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Step-by-step explanation:

Answer:

2 1/2= 2 3/6

7 1/6 + 2 3/6 = 9 4/6= 9 2/3

hope this helps!

Please give the brainliest

Step-by-step explanation:

Answer:

length = 32m, width= 16m

Step-by-step explanation:

l=2w

2(2w+w)=96

2(3w)=96

6w=96,w= 96/6 = 16m

l=2w=2x16=32m

Answer:

Width is 17, and length is 31

Step-by-step explanation:

The perimeter is all the sides added up.

96 is our perimeter.

We can call the width x, so that the length would be x+14

We have two widths and two lengths, and we can make that into an equation.

2(x)+2(x+14)=96

4x+28=96

4x=68

x=17

So now, we know that the width is 17.

Add 14 to that, and you will get 32.

You can double check this.

17+17=34

31+31=62

34+62=96.

Hope it helped.

Therefore, the probability of choosing a number that is more than 4 or odd is  1 or 100%.

To find the probability that the number chosen is more than 4 or odd, we need to add the probabilities of choosing a number that is more than 4 and the probability of choosing a number that is odd and subtract the probability of choosing a number that is both more than 4 and odd, since we would be double-counting this case.

The numbers more than 4 are 5, 6, 7, 8, 9, and 10. The odd numbers are 1, 3, 5, 7, and 9. The number that satisfies both conditions is 5, so we must subtract the probability of choosing 5 once.

Therefore, the probability of choosing a number that is more than 4 or odd is:

(6 + 5 - 1) / 10

= 10/10

= 1

So the probability is 1 or 100%.

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The real-world problem involving a related set of two equations is given below:

Problem: Cost of attending a concert  is made up of base price and variable price per ticket. You are planning to attend a concert with your friends and want to know the number of tickets to purchase for lowest overall cost.

The related set of two equations are:

Equation 1: The total cost (C) of attending the concert is given by:

The equation C = B + P x N,

where:

B  = the base price

P  = the price per ticket,

N = the number of tickets purchased.

Equation 2: The maximum budget (M) a person have for attending the concert is:

The  equation M = B + P*X

where:

X = the maximum number of tickets a person can afford.

So by using the values of B, P, and M, you can be able to find the optimal value of N that minimizes the cost C while staying within your own budget M. so, you can now determine ticket amount to minimize costs and stay within budget.

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Answer:

6 1/10

Step-by-step explanation:

Convert the mixed numbers into improper fractions (denominator × whole number + numerator / denominator):

9 2/5 = 47/5

3 3/10 = 33/10

Convert improper fractions to have the same denominator:

47/5 × 2/2 = 94/10

Find the difference by subtracting the numerators:

94/10 - 33/10 = 61/10

Convert the answer into a mixed number:

61/10 = 6 1/10

Answer: a. (x-8)(x-4)

b. (x-8)(x-6)

c. (x-2)(x-1)

Step-by-step explanation:

a. x^2-12x+32=

x^2-4x-8x+32=

x(x-4)-8(x-4)=(x-8)(x-4)

b. x^2-14x+48=

x^2-6x-8x+48=

x(x-6)-8(x-6)=(x-8)(x-6)

c. x^2-3x+2=

x^2-x-2x+2=

x(x-1)-2(x-1)=(x-2)(x-1)

Answer:

1.37 x 10^-9 F

Step-by-step explanation:

(8.85 x 10^-12) * (0.155) = 1.37 E -12

1.37 E -12 / 0.00100 = 1.37 x 10^-9

Answer:

A)  

\(\begin{array}{|c|c|c|}\cline{1-3} t & H(t) & g(t)\\\cline{1-3} 1 & 60 & 20.4\\\cline{1-3} 2 & 76 & 30.8\\\cline{1-3} 3 & 60 & 41.2\\\cline{1-3} 4 & 12 & 51.6\\\cline{1-3} \end{array}\)

Between 3 and 4 seconds.

B)  The baseballs will collide between 3 and 4 seconds.

Step-by-step explanation:

Given functions:

\(H(t)=-16t^2+64t+12\)

\(g(t)=10+10.4t\)

Substitute the values of t = 1, 2, 3 and 4 into the two functions:

\(H(1)=-16(1)^2+64(1)+12=60\)

\(H(2)=-16(2)^2+64(2)+12=76\)

\(H(3)=-16(3)^2+64(3)+12=60\)

\(H(4)=-16(4)^2+64(4)+12=12\)

\(g(1)=10+10.4(1)=20.4\)

\(g(2)=10+10.4(2)=30.8\)

\(g(3)=10+10.4(3)=41.2\)

\(g(4)=10+10.4(4)=51.6\)

Create a table with the found values:

\(\begin{array}{|c|c|c|}\cline{1-3} t & H(t) & g(t)\\\cline{1-3} 1 & 60 & 20.4\\\cline{1-3} 2 & 76 & 30.8\\\cline{1-3} 3 & 60 & 41.2\\\cline{1-3} 4 & 12 & 51.6\\\cline{1-3} \end{array}\)

The solution to H(t) = g(t) is between 3 and 4 seconds as:

When t = 3, H(t) > g(t)

When t = 4, H(t) < g(t)

To prove this, equate the equations and solve for t:

\(\implies -16t^2+64t+12=10+10.4t\)

\(\implies -16t^2+53.6t+2=0\)

Using the Quadratic Formula to solve for t:

\(x=\dfrac{-b \pm \sqrt{b^2-4ac} }{2a}\quad\textsf{when }\:ax^2+bx+c=0\)

\(\implies t=\dfrac{-53.6 \pm \sqrt{53.6^2-4(-16)(2)} }{2(-16)}\)

\(\implies t=\dfrac{53.6 \pm \sqrt{3000.96}}{32}\)

\(\implies t=3.39, -0.04\:\:(\sf 2\:d.p.)\)

As time is positive, t = 3.39 s (which is between 3 and 4 seconds).

When the two baseballs are at the same height they will collide.

Therefore, the baseballs will collide between 3 and 4 seconds (when t = 3.39 s).

Answer:

Your wrong, it’s B.

X axis = Number of Bottles of water sold

Y axis = Number of dollars collected

So, (x,y)

That means, (Number of Bottles of water sold,Number of dollars collected)

Finally, (10,20) means he sold 10 bottles of water for $20.

Hope that helped!

Step-by-step explanation:

anwers:

B: cameron sells 10 bottles of water for $20

Answer:

This height of a cylinder calculator quickly finds the height of a right circular cylinder in ten different ways. Do you wonder how to find the height of a cylinder? Just choose which two of the parameters you know, enter specified values and compute the height.

Keep reading if you want to learn what are possible height of a cylinder formulas. In most cases, you can estimate it knowing only two of the below quantities:

Answer:

56x6

Step-by-step explanation:

Answer:

0 or 2

Step-by-step explanation:

The number of distinct imaginary roots possible are 2.

The zeros of polynomial refer to the values of the variables present in the polynomial equation for which the polynomial equals 0.

If f(x) is a third degree polynomial then by corollary to the fundamental theorem of algebra , it must have 3 roots.

It as complex roots occurs in pairs, thus there must be even number of complex roots.

So, there is 2 complex distinct complex roots are possible in third degree polynomial.

Corollary to the fundamental theorem states that every polynomial of  degree n>0 has exactly n zeroes.

Therefore, the number of distinct imaginary roots possible are 2.

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f'(x) = -1/[³√csc^-1(x²)+tan^-1(2x)]^2 * [(-1/3)*csc^-1(x²)^(-2/3)*1/|x|1/√(x^4-1) + 1/3(1/(1+4x^2))]

To find the derivative of f(x) = 1 / (³√csc^−1(x²)+tan^−1(2x)), we can use the chain rule and the power rule of differentiation.

Let's first find the derivative of the denominator, d/dx (³√csc^−1(x²)+tan^−1(2x)):

Using the chain rule for the first term, we have:

d/dx (csc^-1(x²))^1/3 = (1/3)*(csc^-1(x²))^(-2/3)*d/dx(csc^-1(x²))

Using the chain rule and the reciprocal rule for the second term, we have:

d/dx (tan^-1(2x))^1/3 = (1/3)(tan^-1(2x))^(-2/3)d/dx(tan^-1(2x))

= (1/3)(1/(1+(2x)^2))(1/2)d/dx(2x)

= (1/3)(1/(1+4x^2))

So, the derivative of the denominator is:

d/dx (³√csc^−1(x²)+tan^−1(2x)) = (1/3)*(csc^-1(x²))^(-2/3)d/dx(csc^-1(x²)) + (1/3)(1/(1+4x^2))

Now, applying the chain rule to the entire expression, we get:

f'(x) = -1/[³√csc^-1(x²)+tan^-1(2x)]^2 * [1/3 * (csc^-1(x²))^(-2/3)*d/dx(csc^-1(x²)) + 1/3 * (1/(1+4x^2))]

Substituting the derivative of csc^-1(x²) with respect to x, which is d/dx(csc^-1(x²)) = -1/|x|*1/√(x^4-1), we get:

f'(x) = -1/[³√csc^-1(x²)+tan^-1(2x)]^2 * [(-1/3)*csc^-1(x²)^(-2/3)*1/|x|1/√(x^4-1) + 1/3(1/(1+4x^2))]

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3.25 kg of carrots would cost £2.31.

The number of buttons that she can wear proudly will be 5.

The ratio is the division of the two numbers. In reality, ratios and proportions are only two sides of the same coin. A proportion is what results when two ratios are equal. Typically, fractions are used to define ratios and proportions. A ratio is created when we use the symbol ":" to denote a fraction, and a percentage is created when we use "::" to represent two ratios.

For example,

a/b, where a and b represent the numerator and denominator, respectively.

The relationship between two variables is called a proportion.

As per the given question,

Cost of one button = $0.28

The cost of buttons that she can wear = $1.40

A number of buttons = $1.40/$0.28 = 5

The number of buttons that she can wear proudly will be 5.

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Answer:

The correct option is;

The graph has a vertical asymptote at x = -3

Step-by-step explanation:

Whereby the given function is \(h(x) = 2\cdot x - \dfrac{6}{x + 3}\),  we have;

The function is undefined at x = -3, therefore, the function has a verical asymptote at x = -3

The graph crosses the x-axis (the x-intercept) when the y coordinate, value h(x) = 0, therefore, we have;

\(2\cdot x - \dfrac{6}{x + 3} = 0 \ at \ the \ x-intercept\)

Which gives;

\(2\cdot x = \dfrac{6}{x + 3}\)

2·x² + 6·x - 6 = 0

Dividing by 2 gives;

x² + 3·x - 3 = 0

x = (-3 ± √(3² - 4×1×(-3)))/(2 × 1) = (-3 ± √21)/2

Similarly, the y-intercept occurs when h(0) = -2 as follows;

\(h(0) = 2\times 0 - \dfrac{6}{0 + 3} = -2\)

Therefore, the graph crosses the y-axis, the y-intercept at (0, -2)

The correct option is, that the graph has a vertical asymptote at x = -3

Answer:image

Step-by-step explanation:

Answer:

2x+27+x+27=180

3x+54=180

3x=180-54

x=126/3

x=42

angle B=x+27

=42+27

=69 degree

Step-by-step explanation:

Answer:

B=69

Step-by-step explanation:

Supplementary angles have a sum of 180. Set up your formula as

180=(2x+27)+(x+27)

180=2x+27+x+27

180-27-27=3x

126=3x

126/3=x

42=x

Now substitute 42 in place of x for Angle B

Angle B = x+27

B = 42+27

B=69

Check your work by doing the same for Angle A

Angle A = (2x+27)

A=2*42+27

A=84+27

A=111

Now add both together and if you did it right, your answer is 180

69+111 = 180

The one-sample chi-square test is used to determine whether the distribution of a single categorical variable significantly differs from what would be expected by chance. The statement is True.

The one-sample chi-square test is a statistical test used to determine if there is a significant difference between the observed frequency and the expected frequency in a single categorical variable. It compares the observed frequency distribution of a variable to the expected frequency distribution, assuming that the null hypothesis is true.

This test compares observed frequencies to expected frequencies and calculates a chi-square statistic to assess the significance of the difference.

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Answer:

6x - 8

Step-by-step explanation:

Distribute 1/2 to all terms within the parenthesis:

1/2(12x - 16) = (12x - 16)/2

12x/2 = 6x

-16/2 = -8

6x - 8 is your answer.

~

Answer:

1. is 130 times taller

2. is 0.756 kilograms

Step-by-step explanation:

for 1, you divide 65 by 0.5 or multiply it by 1/2

for 2, you divide 756 by 1000

Answer: 0.10175

Step-by-step explanation:

First, bring the decimal points to the right for both numbers, to be a total of 5 decimal points to the right. Then, with the numbers 25 and 407, multiply them, and we get 10175. Then, we must bring the 5 decimal points back, and we end up with 0.10175.

Answer: 0.10

Step-by-step explanation:

on time4llearning

Answer:

9.41 km/h

Step-by-step explanation:

The total distance of the race, d = 8 km

The time Sarah took to run the race, t = 55 mins

The time Jo started the race = 3 mins later than Sara

The point Jo caught up with Sarah = 6 km into the race

The rate at which Jo and Sarah ran = Constant speed

The required information = Jo's speed

From the information given, Sarah's speed, v = 8 km/(55 mins) = (8/55) km/min × 60min/h = 96/11 km/h

The time it would take Sarah to run 6 km = 6 km/(8 km/(55 mins)) = 41.25 mins

Given that Jo started 3 minutes late, and they both arrive at 6 km into the race at the same point in time, the time it took Jo to arrive at 6 km into the race = The time it took Sarah - 3 minutes

∴ The time it took Jo to run the 6 km = 41.25 minutes - 3 minutes = 38.25 minutes

Given that Jo ran at a constant speed, and speed = distance/time, we have;

Jo's speed = 6 km/(38.25 min) = 8/51 km/min × 60 min/h = (160/17) km/h ≈ 9.41 km/h.

Answer:

x = 7

Step-by-step explanation:

There is a total of 180 degrees in a triangle. To solve you add the other angles and set = to 180 then solve for x

180 = 33 + 90 + 7x +8

172 = 33 + 90 + 7x

139 = 90 +7x

49 = 7x

7 = x

Answer:

  see attached

Step-by-step explanation:

You want to graph the lines described by the equations ...

The point-slope form of the equation of a line is ...

  y -k = m(x -h) . . . . . . . line with slope m through point (h, k)

The point coordinates and slope can be read from the equation. When graphing these equations, it works well to plot the point, then draw a line through it that has the required slope (rise/run).

The graphs of these lines are attached. The relevant point is marked on each one.

Answer:

Step-by-step explanation:

Verify the ratio is same for each pair of corresponding sides:

Confirmed the three sides have same ratio

Correct option is A