Please help -(-4)(-6)-3/5(10+5)/1/3!! I’ll give 30 points.

The surface area of the square pyramid is approximately 41.83 cm².

To start with, let's define a square pyramid.

The slant height of the pyramid can be found using the formula:

l = √(h² + (s/2)²)

where h is the height of the pyramid and s is the length of one side of the base.

Plugging in the given values, we get:

l = √(7² + (4/2)²) = √(57)

Now that we know the slant height, we can find the area of each triangular face using the formula:

A = (1/2)bh

where b is the base of the triangle, and h is the height of the triangle.

Plugging in the given values, we get:

A = (1/2)(4)(√(57)) = 2√(57)

Since there are four triangular faces, the total area of all the triangular faces is:

4A = 8√(57)

Finally, we can find the total surface area of the pyramid by adding the area of the square base to the area of all the triangular faces:

surface area = 16 + 8√(57) = approximately 41.83 cm²

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Complete Question:

Find the surface area of the square pyramid where the base is 4cm and the  height is 7cm.

Answer:

A.

Step-by-step explanation:

baj si ud fbs owo ehnf ko wj bd

The function is plotted and is attached.

It is an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (dependent).

It is given in the question that

f(x) = x if x <1

1 if x>_ 1

The graph of above function is attached below,

For domain x > 1, f(x)=x

For domain, x≥ 1, f(x)=1

When we see the graph that have been plotted on the basis of domain, Option D is the correct graph similar to one in the image attached.

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3x + 2y - 2x + y + 12 —> x + 3y + 12

4y + 3y + 3x - 6y - 10 -2 —> 3x + y - 12

12 - 3y - 2x + x + 2x —> x - 3y + 12

x + 3y + 2x - 3x + 7 + 5 —> 3y + 12

Answer:

  2. 26.2 m

  3. 117.2 cm

Step-by-step explanation:

You want the perimeters of two figures involving that are a composite of parts of circles and parts of rectangles.

The circumference of a circle is given by ...

  C = πd . . . . . where d is the diameter

The length of the semicircle of diameter 12.6 m will be ...

  1/2C = 1/2(π)(12.6 m) = 6.3π m ≈ 19.8 m

The two lighted sides of the rectangle have a total length of ...

  3.2 m + 3.2 m = 6.4 m

The length of the light string is the sum of these values:

  19.8 m + 6.4 m = 26.2 m

The length of the string of lights is about 26.2 meters.

The perimeter of the figure is the sum of four quarter-circles of radius 11.4 cm, and 4 straight edges of length 11.4 cm.

Four quarter-circles total one full circle in length, so we can use the formula for the circumference of a circle:

  C = 2πr

  C = 2π·(11.4 cm) = 22.8π cm ≈ 71.6 cm

The four straight sides total ...

  4 × 11.4 cm = 45.6 cm

The perimeter of the figure is the sum of the lengths of the curved sides and the straight sides:

  71.6 cm + 45.6 cm = 117.2 cm

The design has a perimeter of about 117.2 cm.

__

Additional comment

The bottom 12.6 m edge in the figure of problem 2 is part of the perimeter of the shape, but is not included in the length of the light string.

<95141404393>

Answer:

i cant see the question :(

Step-by-step explanation:

The standard deviation of the trial where a student researcher is interested in assessing the physical fitness of 6th graders in the school district in which they are currently working is 1.21. The variance of the trial is 2.475 and The mean of the trial is 4.5

Step 1: Calculation of the meanFrom the given data, the probability of success is pre-observed as 0.45 and the number of students who have conducted the trial is 10.To calculate the mean of the trial, we use the formula below:

μ = np

Where;

μ = mean of the trial

n = number of students

p = probability of success

Substituting the values in the formula

;μ = 10 × 0.45μ = 4.5

Step 2: Calculation of the variance The variance of the trial can be calculated using the formula below:

σ² = npq

Where; σ² = variance of the trial

n = number of students

p = probability of success

q = probability of failure, which is given by q = 1 – p

Substituting the values in the formula

;σ² = 10 × 0.45 × (1 – 0.45)σ² = 2.475

Step 3: Calculation of the standard deviation The standard deviation of the trial can be calculated using the formula below:

σ = √σ²

Substituting the value of variance in the formula above,σ = √2.475σ = 1.21

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Answer:

True

Step-by-step explanation:

If you took a true if-then statement, inserted not in each clause and reversed the clauses you will have created the contrapositive. The contrapositive of an if-then statement has the same true value as the original statement.

Statement:

If p, then q.

Contrapositive:

If not q, then not p

If the statement is true, then the contrapositive is also true.

The accumulated amount after 25 years is , $70,702.80.

Now, We can use the formula for compound interest to find the accumulated amount after 25 years:

A = P(1 + r/k)^(kt)

Where A is the accumulated amount, P is the principal , r is the interest rate, n is the number of times the interest is compounded per year, and t is the time period.

In this case, we have:

P = $25,300

r = 0.045 (

k = 12 (monthly compounding)

t = 25

Substituting these values into the formula, we get:

A = $25,300(1 + 0.045/12)^(12 x 25)

A ≈ $70,702.80

Therefore, the accumulated amount after 25 years is ,

$70,702.80.

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Joy is absolutely right. This is a line that runs horizontally. Given that it has the same y coordinates, it will be a line that is horizontal.

This is further explained below.

Generally, In mathematics, the word "linear function" may refer to two separate but related concepts.

In calculus and other related fields, a linear function is a function whose graph is a straight line; more specifically, a linear function is a polynomial function of degree zero or one.

In conclusion, Joy is absolutely right. This is a line that runs horizontally. Given that it has the same y coordinates, it will be a line that is horizontal.

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Answer:

a) 22.8%

Step-by-step explanation:

(2590-2000) ÷ 2590 =

590 ÷ 2590 =

.2277 = 22.8%

The value of each permutation P(8,8) is 40320.

A permutation is a mathematical approach that determines the number of viable arrangements in a fixed while the order of the preparations matters. Common mathematical troubles contain selecting only numerous objects from a hard and fast of gadgets in a certain order.

₈P₈  using the formula

\(nPr = \frac{n!}{(n-r)!} \\\)

\(nPr = \frac{8!}{(8-8)!} \\\)

Subtract  8 from 8

\(= \frac{8!}{(0)!} \\\)

=8×7×6×5×4×3×2×1

=56×720

=40320

The P-value is the chance of obtaining a result as a minimum as severe as the take a look at statistic given that the null speculation is authentic

Hence , permutation is p(8,8) is 40320.

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Answer:

The answer is 3 + p × 7.....

.

The objective function value for this problem is 6279. The correct answer is c. 6279.

To compute the objective function value for the given problem, we need to find the values of X and Y that satisfy the constraints and minimize the objective function.

The constraints are as follows:

2X ≥ 0

21X + 23Y = 483

X + Y ≥ 0

Let's solve the second constraint for Y:

21X + 23Y = 483

23Y = 483 - 21X

Y = (483 - 21X) / 23

We can substitute this value of Y in the third constraint to eliminate Y:

X + Y ≥ 0

X + (483 - 21X) / 23 ≥ 0

Simplifying the inequality:

23X + 483 - 21X ≥ 0

2X + 483 ≥ 0

2X ≥ -483

X ≥ -241.5

Since X must be greater than or equal to zero according to the first constraint, the feasible range for X is X ≥ 0.

Now, substituting the feasible values of X in the objective function:

273X + 299Y = 273(0) + 299Y = 299Y

To minimize this expression, we need to find the minimum value of Y.

Using the second constraint:

21X + 23Y = 483

21(0) + 23Y = 483

23Y = 483

Y = 21

Substituting this value of Y in the objective function:

273X + 299Y = 273(0) + 299(21) = 0 + 6279 = 6279

Therefore, the objective function value for this problem is 6279. The correct answer is c. 6279.

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Answer: 6

Step-by-step explanation:

Just some simple ratios

P = Pizza People = Pl

P: Pl

2 : 9

x: 27

We want to find x.

Since 27/9 is equal to 3, we multiply 2 by 3 as well!

2x3=6, our desired amount.

Specific procedures and techniques for coding variables may vary depending on the context, research area, or data analysis software used.

What is a Variable?

A variable is a quantity that can change in the context of a mathematical problem or experiment. We usually use one letter to represent a variable. The letters x, y, and z are common general symbols used for variables.

The procedure for identifying or indicating the value of cases on a variable is commonly known as data coding or data labeling. It involves assigning specific numerical or categorical values ​​to represent different categories or levels of a variable.

Here is the general procedure for encoding variables:

Define the variable: Start by clearly defining the variable you want to code. Understand its nature (eg nominal, ordinal, interval or ratio) and the categories or levels it covers.

Determine the encoding scheme: Decide on the encoding scheme you will use to represent the variable. For nominal variables (categories without their own order), you can assign numbers or labels to each category. For ordinal variables (categories with a meaningful order), you can assign numbers or labels that reflect the order. For interval or ratio variables, the numerical values ​​themselves can indicate the value of the variable.

Assign Codes: Assign specific codes or labels to represent each category or level of the variable. These codes can be numbers, letters, or any other symbol you choose. Make sure the codes are unique and do not overlap.

Apply Coding: Apply assigned codes to matching cases or observations in your dataset. Depending on the software or tool you are using, there are different ways to do this. You can manually enter codes, use syntax or programming commands, or use data transformation functions.

Verify your coding: Double-check your coding to ensure accuracy. Review a sample of the coded cases to ensure they match the intended coding scheme. This step is essential to avoid errors and inconsistencies in your data.

It is important to note that specific procedures and techniques for coding variables may vary depending on the context, research area, or data analysis software used.

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Answer:

b i think

Step-by-step explanation:

The 99% confidence interval for the true mean length of the manufactured bolt is (2.9177, 3.0823)

Here, we need to construct a 99% confidence interval for population mean (μ) is given by

μ = x + Zα/2 * σ/√n   or    μ = x - Zα/2 * σ/√n

where, μ = population mean

x = sample mean

  = 3 inches

σ = population standard deviation

  = 0.3 inches

Zα/2= z score for a two tailed test at level of significance α = 2.576( for a 99% confidence level)

So, the upper limit would be,

μ = 3 + 1.645 * (0.3/√36)

μ = 3 + 1.646 * (0.3/6)

μ = 3.0823

And the lower limit would be,

μ = 3 - 1.645 * (0.3/√36)

μ = 3 - 1.646 * (0.3/6)

μ = 2.9177

Hence, the 99% confidence interval is (2.9177, 3.0823)

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The variable overhead efficiency variance is a measure of the difference between the actual hours of direct labor used and the standard hours of direct labor allowed for producing a certain level of output.

It indicates whether the actual usage of direct labor hours was more or less efficient than the standard set for the given level of production.

The variable overhead efficiency variance is a component of variance analysis used in cost accounting. It is calculated by subtracting the standard hours of direct labor allowed from the actual hours of direct labor used, and then multiplying the difference by the standard variable overhead rate. The formula for the variable overhead efficiency variance is as follows:

Variable Overhead Efficiency Variance = (Actual Hours - Standard Hours) × Standard Variable Overhead Rate

The variable overhead efficiency variance provides insight into the efficiency of utilizing direct labor hours in the production process. If the actual hours of direct labor used are greater than the standard hours allowed, it indicates an unfavorable variance, suggesting that more labor hours were consumed than necessary for the given level of output. On the other hand, if the actual hours are less than the standard hours allowed, it results in a favorable variance, indicating that the labor hours were used more efficiently than expected.

By analyzing the variable overhead efficiency variance, managers can identify areas where labor utilization can be improved and take appropriate actions to reduce inefficiencies. This variance helps in monitoring and controlling production costs by assessing the effectiveness of labor utilization in relation to the standards set for the production process.

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The angle measures are given as follows:

Angles 5 and 8 form a linear pair, hence they are supplementary, meaning that the mesure of angle 5 is given as follows:

m < 5 + m < 8 = 180º

m < 5 + 105º = 180º

m < 5 = 75º.

Angles 5 and 11 are alternate exterior angles, hence they are congruent and the measure of angle 11 is given as follows:

m < 11 = 75º.

Angles 1 and 13 are corresponding angles, meaning that they are congruent, hence the measure of angle 13 is given as follows:

m < 13 = 115º.

Angles 13 and 16 form a linear pair, hence they are supplementary, meaning that the mesure of angle 16 is given as follows:

m < 13 + m < 16 = 180º

m < 16 = 180º - 115º

m < 16 = 65º.

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Answer:

The value of x is 16

Step-by-step explanation:

x=16

Answer:

120:72:48

Step-by-step explanation:

Remark

Whatever the answer is (call it x to begin with), the equation starts as

5x + 3x + 2x = 240

What this means is that when you solve for x the results when multiplied by the ratio, should add to 240

Equation

5x + 3x + 2x = 240

Solution

Combine all the terms on the left.

10x = 240                    Divide by 10

x = 240/10

x = 24

Check

Step-by-step explanation:

number of boys=25

number of girls =16

ratio of boys to girl is 25:16

and the fraction is =25/16

Answer: a)0.0399, b)0.2995, c)0.6588, d)0.3412

Step-by-step explanation:

It is the same exact formula as the only other user here made, it's just that their final answer is wrong. Just put it in your calculator (the formulas of the other users) and these are the answers you should be getting

Answer:

  (a)  0.0399

  (b)  0.2995

  (c)  0.6588

  (d)  0.3412

Step-by-step explanation:

You want the probability distribution in 5-card hands for 2, 1, 0, and not 0 aces.

The probability of some number of aces is the product of the ways that number of aces can be drawn from the 4 in the deck, multiplied by the number of ways the remaining cards in the hand can be drawn from the 48 non-aces in the deck, all divided by the number of possible 5-card hands.

  P(2 aces) = 4C2 · 48C3 / 52C5 ≈ 0.0399

  P(1 ace) = 4C1 · 48C4 / 52C5 ≈ 0.2995

  P(0 aces) = 48C5 / 52C5 ≈ 0.6588

  P(>0 aces) = 1 -P(0 aces) = 1 -0.6588 = 0.3412

__

Additional comment

  nCk = n!/(k!(n-k)!) . . . the number of ways k can be chosen from n

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Answers:

====================================================

Explanation:

We have these given facts

Fact D indicates that 18 goes on the outside of the two circles, but inside the universal set shown by the rectangle.

We'll use facts A and D to find that 75-18 = 57 students like either football, cricket, or both. So the numbers inside the regions in the circles must add up to 57.

Now use the values from facts B and C. They add to 20+30 = 50. This is the number of students who either like football only OR like cricket only. None of these 50 students like both sports. But we found that 57 like one or the other or both. So that must mean 57-50 = 7 students like both sports.

We have enough info to fill out the venn diagram as shown below.

--------------

Now to answer the questions your teacher asked:

The triangles LMN and LPQ are illustrations of similar triangles

The length of line segment PM is 5.5 cm

The given parameters are:

LP = 2 cm

LQ = 3 cm

QN = 2 cm

m ∠LPQ = m ∠LNM

m ∠LQP = ∠LMN

The above parameters mean that, triangles LMN and LPQ are similar by the AA similarity theorem.

So, we have the following equivalent ratio

\(LP : LQ = LN : LM\)

The ratio becomes

\(2 :3 = 5 : LM\)

The segment LM is the sum of LP and PM.

So, we have:

\(2 :3 = 5 : LP + PM\)

Express as fraction

\(\frac{2}{3} = \frac{5}{ LP + PM}\)

Substitute 2 for LP

\(\frac{2}{3} = \frac{5}{2 + PM}\)

Cross multiply

\(4 + 2PM = 15\)

Subtract 4 from both sides

\(2PM = 11\)

Divide both sides by 2

\(PM = 5.5\)

Hence, the length of line segment PM is 5.5 cm

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Answer:

3x^2+5x-2=0

Step-by-step explanation:

3x*x -x+6x-2

=3x^2+5x-2

Hope it helps :)

The smallest number of eggs that could have been in the box is 1134

The problem is to find the smallest number of eggs that could have been in the box, given the remainder when taking them out by different numbers. Here are the moves toward tackling it:

Allow n to be the quantity of eggs in the container. Then we have the accompanying arrangement of congruences:

n ≡ 1 (mod 2)

n ≡ 1 (mod 3)

n ≡ 1 (mod 4)

n ≡ 1 (mod 5)

n ≡ 1 (mod 6)

n ≡ 0 (mod 7)

For this problem, we have k = 6 k = 6, a i = {1,1,1,1,1,0} a_i = {1,1,1,1,1,0}, M i = {1260,840,630,504,420,720} M_i = {1260,840,630,504,420,720}, and y i = {−1,−2,−3,-4,-5,-6} y_i = {-1,-2,-3,-4,-5,-6}.

Plugging these values into the formula and simplifying modulo 5040, we get:

n = (−1260 + −1680 + −1890 + −2016 + −2100 + 0) mod 5040

n = (−8946) mod 5040

n = (−3906) mod 5040

n = 1134 mod 5040

Therefore, the smallest number of eggs that could have been in the box is 1134

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The number 22_1034 is not divisible by 9.

What is divisibility ?

Divisibility is a mathematical concept that describes whether one integer (a whole number) can be divided evenly by another integer, without leaving a remainder.

In other words, if we have two integers a and b, we say that a is divisible by b if and only if a can be expressed as a product of b and another integer without leaving a remainder. This is typically denoted by writing a divided by b as a fraction, and if the remainder is zero, we say that a is divisible by b.

According to the question:
To check if the number 22_1034 is divisible by 9, we can add up its digits and see if the sum is divisible by 9.

2 + 2 + 1 + 0 + 3 + 4 = 12 + 4 = 16

Since 16 is not divisible by 9, the number 22_1034 is not divisible by 9.

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