PLEASEEEE HELP ME PLEASEEE AM STRUGGLING

Answer:

  277 cm^2

Step-by-step explanation:

Two of the triangular faces will have areas of ...

  A = 1/2bh = (1/2)(8 cm)(11 cm) = 44 cm^2

and the other two will have areas of ...

  A = 1/2bh = (1/2)(9 cm)(13 cm) = 58.5 cm^2

The base will have an area of ...

  A = LW = (9 cm)(8 cm) = 72 cm^2

So, the total area will be ...

  2(44 cm^2) +2(58.5 cm^2) +72 cm^2 = 277 cm^2

_____

Comment on the problem

You could not actually build this pyramid. The height of the peak above the 8-cm edges must be ...

  √(11^2 -(4.5)^2) = 10.04 cm

The height of the peak above the 9-cm edges must be ...

  √(13^2 -4^2) = 12.37 cm.

The peak cannot be in two places at once. This geometry is impossible.

Answer:

The correct answer should be 112 pie Units ^3

Step-by-step explanation:

In general, there are n>3 lines in the plane. Show that at least n - 2 triangles are formed by these lines.

Let's consider the following diagram, where each line is labelled with a letter:

A-B-C-D-E

Since each line intersects with at least one other line, there are at least n-2 triangles that can be formed. For example, triangle ABC, triangle ABD, triangle ABE, triangle BCD, triangle BDE, and triangle CDE are all triangles that can be formed from our five lines.

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Answer:

The cheerios are more expensive per ounce

Step-by-step explanation:

6. 22 ounce box of Cheerios cost $2.79---$0.45

A 32 ounce box of Wheaties cost $3.50----$0.11

2.79/6.22 =0.45

3.50/32 = 0.11

Answer:

Aisha wrapped 17 presents.

Step-by-step explanation:

If each present weighs 1/3 kilograms (the "kilograms" doesn't matter, just the weight of each present and the combined weight), and 3 presents fit in one kilogram, then 15 can fit in 5 kilograms, and 2 more can fit in the remaining two thirds.

Answer:

The answer is 17 presents.

Step-by-step explanation:

Each present weighs 1/3 kg. so you turn 5 2/3 into an improper fraction, 17/3. And then now you do 17/3 divided by 1/3, which gives you 17.

The figure at the right is called an escher cube. It is named after the dutch artist M.C. Escher. There are 7 white shapes created by this drawing. Name of the 7 shapes are given below-

At left side: Trapezoid

At behind: Trapezoid and rectangle

At bottom: Triangle and trapezoid

At right: Triangle and trapezoid

What is Escher cube?

For his lithograph Belvedere, M.C. Escher created the impossible cube, also known as the irrational cube. It is a two-dimensional figure, with characteristics drawn inconsistently from how they would look in a real cube, that at first glance mimics a perspective sketch of a three-dimensional cube.

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Answer:

3

Step-by-step explanation:

Answer:

62

Step-by-step explanation:

Answer:

∠ RPQ = 28°

Step-by-step explanation:

Given ∠ PRQ = 90° and ∠ SQR = 34°

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ PSQ is an exterior angle of the triangle, so

∠ PSQ = 90° + 34° = 124°

Since PS = SQ then Δ PQS is isosceles and then base angles are congruent

∠ SPQ = ∠ SQP , thus

∠ RPQ = \(\frac{180-124}{2}\) = \(\frac{56}{2}\) = 28°

The derivative dy/dx of the equation ysin(x^2) = xsin(y^2) is given by (sin(y^2) - ycos(x^2)2x) / (sin(x^2) - 2yxcos(y^2)).

In the given equation, y and x are both variables, and y is implicitly defined as a function of x. To find dy/dx, we differentiate each term using the chain rule and product rule as necessary.

Differentiating the left-hand side of the equation, we apply the product rule to ysin(x^2). The derivative of ysin(x^2) with respect to x is dy/dxsin(x^2) + ycos(x^2)*2x.

Differentiating the right-hand side of the equation, we apply the product rule to xsin(y^2). The derivative of xsin(y^2) with respect to x is sin(y^2) + x*cos(y^2)2ydy/dx.

Now we have two expression for the derivative of the left and right sides of the equation. To isolate dy/dx, we can rearrange the terms and solve for it.

Taking the derivative of ysin(x^2) = xsin(y^2) with respect to x using implicit differentiation yields:
dy/dxsin(x^2) + ycos(x^2)2x = sin(y^2) + xcos(y^2)2ydy/dx.

By rearranging the terms, we can solve for dy/dx:
dy/dx * (sin(x^2) - 2yxcos(y^2)) = sin(y^2) - y*cos(x^2)*2x.

Finally, we can obtain the value of dy/dx by dividing both sides by (sin(x^2) - 2yxcos(y^2)):
dy/dx = (sin(y^2) - ycos(x^2)2x) / (sin(x^2) - 2yxcos(y^2)).

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We know that the volume of a cube is given by V = s^3, where s is the length of a side. Taking the derivative of both sides with respect to time, we get:

dV/dt = 3s^2 ds/dt

We are given that dV/dt = 77 cubic feet per second and V = 8 cubic feet. Therefore,

77 = 3s^2 ds/dt
ds/dt = 77/(3s^2)

We also know that the surface area of a cube is given by A = 6s^2. Taking the derivative of both sides with respect to time, we get:

dA/dt = 12s ds/dt

Substituting ds/dt from above, we get:

dA/dt = 12s (77/(3s^2))
dA/dt = 308/s

At the instant when the volume of the cube is 8 cubic feet, s = (8)^(1/3) = 2, since s is the length of a side. Therefore,

dA/dt = 308/2 = 154

So the rate of change of the surface area of the cube is 154 square feet per second.
To solve this problem, we will use the given information about the rate of change of volume and relate it to the rate of change of surface area. First, let's express the volume (V) and surface area (A) of a cube in terms of its side length (s):

1. Volume of a cube: V = s³
2. Surface area of a cube: A = 6s²

Now, differentiate both equations with respect to time (t):

1. dV/dt = 3s² ds/dt
2. dA/dt = 12s ds/dt

We are given that dV/dt = 77 cubic feet per second. We need to find dA/dt when the volume is 8 cubic feet.

From the volume equation (V = s³), we can find the side length (s) when the volume is 8 cubic feet:

8 = s³
s = 2 feet (since 2³ = 8)

Now, we can find ds/dt by plugging in the values for s and dV/dt into the first differentiated equation:

77 = 3(2²) ds/dt
77 = 12 ds/dt
ds/dt = 77/12 feet per second

Now that we have ds/dt, we can find dA/dt by plugging in the values for s and ds/dt into the second differentiated equation:

dA/dt = 12(2)(77/12)
dA/dt = 24(77/12)
dA/dt = 154 square feet per second

So, the rate of change of the surface area of the cube is approximately 154 square feet per second when the volume is 8 cubic feet.

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Answer:

$332.55

Step-by-step explanation:

In order to figure our Cliff Alsworth's average monthly spendings on utilities, we need to add the amount he's spent each month, and divide it by the amount of months he bought utilities.

369.75 + 330.90 + 287.00 = 997.65

997.65 / 3 = 332.55

Therefore, the average Cliff's average payment for utilities is $332.55 per month. Hope you ace your test! :)

Jaylon and Paula should expect the pointer to land on 4 around 30 and 43 times respectively.

A probability calculated by a series of tests is known as experimental probability.

The given table is as follows:

              1    2    3    4

Jaylon:   6    8    9    7

Paula:    8     5     7   10

To determine the experimental probability of the pointer landing on 4 for Jaylon, we add up the number of times the pointer landed on 4 for Jaylon and divide by the total number of spins:

Experimental probability for Jaylon = (number of times the pointer landed on 4 for Jaylon) / (total number of spins)

= 7 / 30

Similarly,

Experimental probability for Paula:

= 10 / 30

Expected number of times the pointer will land on 4 = (experimental probability) x (total number of spins)

For Jaylon: (7 / 30) × 130 = 30.33

For Paula: (10 / 30) × 130 = 43.33

Therefore, Jaylon and Paula should expect the pointer to land on 4 around 30 and 43 times respectively.

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The missing table has been attached below.

Answer:A function f(x) is even if f(-x) = f(x). The function is odd if f(-x) = -f(x). An even function has reflection symmetry about the y-axis. An odd function has rotational symmetry about the origin.

Step-by-step explanation:

The function is even when f(-x) = f(x) and is odd when f(-x) = -f(x).This has been obtained using even-odd functions.

What are even-odd functions?

When the output value of a real-valued function, f(x), is equal to f(x), for all values of x inside the domain of f, the function is said to be an even function.

It is claimed that a real-valued function f(x) is an odd function when, for all values of x in the domain of f, the output value of f(-x) is equal to the negative of f(x).

We have an even function if we have an expression that is equivalent to f(x) and we have an odd function if we obtain an expression that is equivalent to -f(x).

If we take a function and substitute x for -x, simplify the result, and then compare it to what you started with, you can "determine algebraically" if the function is even, odd, or neither.

The function is even if you come out with exactly what you started with (i.e., if f (-x) = f (x), in which case all of the signs are the same. If you come out with exactly the opposite of what you started with (i.e., if f(-x) = -f (x), in which case all of the signs are switched), it is an odd function.

Hence, the function is even when f(-x) = f(x) and is odd when f(-x) = -f(x).

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Answer:

98÷7=14 cuz 14×7=98

Step-by-step explanation:

The order of events from least likely to most likely are as follows:

The reason for this order is because of the chances of each event occurring. Event D has the least chance of occurring because no numbers in the set have a value less than or equal to 0. Event A is the next least likely because only one number in the set is greater than 0, which is the number 1. Event C is the next least likely because only two numbers in the set are at least 2 (2 and 3). Event B is the next least likely, as there are only five even numbers in the set (2, 4, 6, 8, and 10). Events E, F, G, and H are the most likely to occur, because of the number of numbers that are divisible by 3, and 5, and are prime numbers.

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Answer: 1306.5 m^3

Step-by-step explanation:

1. The formula for the volume of a cylinder is: V=\(\pi\)r^2h

2. If you substitute the values into the equation, you get

V = pi * 5.7^2 * 12.8 = 1306.5

3. 1306.5 is already to the nearest tenth, so that is the answer.

Step-by-step explanation:

3(2x - 3) - 4(2x + 1) <= 26

-2x - 13 <= 26

2x <= -39

x <= -19.5.

Answer:

x ≥ \(6\frac{1}{2}\)

Step-by-step explanation:

3 ( 2x - 3 ) - 4 ( 2x + 1 ) ≤ -26

6x - 9 - 8x - 4 ≤ -26

-2x ≤ -13

x ≥ \(6\frac{1}{2}\)

Using central limit theorem, the probability that the class of 20 students will have a mean completion time greater than 60 minutes on the unit 5 test is 0.00017332

We can use the Central Limit Theorem (CLT) to approximate the distribution of the sample mean completion time for the class. According to CLT, the distribution of the sample mean is approximately normal, with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.

In this case, the population mean is given as 48 minutes, the population standard deviation is given as 15 minutes, and the sample size is 20. Therefore, the mean of the sample mean completion time is also 48 minutes, and the standard deviation of the sample mean completion time is 15/√20 ≈ 3.3541 minutes.

To find the probability that the class mean completion time is greater than 60 minutes, we can standardize the distribution of the sample mean completion time using the z-score formula:

z = (x - μ) / (σ / √n)

where x is the value we want to find the probability for (in this case, x = 60), μ is the population mean, σ is the population standard deviation, and n is the sample size.

Plugging in the values, we get:

z = (60 - 48) / (15 / √20) = 3.5777

Using a standard normal distribution table (or calculator), we can find the probability that a z-score is greater than 3.5777.

P = 0.00017332

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The answer is A. No, because for each input there is not exactly one output.

For a relation to be a function, there must be exactly one output for each input. This means that for each x-value (input), there can be no more than one y-value (output).

If there is more than one y-value for any given x-value, then the relation is not a function.

Here we have

The following points represent a relation

Where x represents the independent variable and y represents the dependent variable.

The points are (3/4, -2), (1, 5), (-2, -7), (1, -1/2), and (6, 6)

To determine if the relation is a function, we need to check if for each input (x-value) there is exactly one output (y-value).

Looking at the given points, we can see that there are two points that have the same x-coordinate that are (1, 5) and (1, -1/2).

This implies for x = 1 there are two output values for y that is 5 and -1/2, thus the relation is not a function.

Therefore,

The answer is A. No, because for each input there is not exactly one output.

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Answer:

Step-by-step explanation:

Draw a diagram of a vertical wall with a ladder leaned against it.

You can say that the ladder is 8 meters long and the distance from the bottom of the ladder to the base of the wall is 2 meters..

Then ask the question At what height on the wall is the top of the ladder?

This is calculated using the Pythagoras theorem - the ladder is the hypotenuse used of the right angled triangle formed by the wall, ladder and the ground.

8^2 = x^2 + 2^2      where x is the required height.

x^2 = 8^2 - 2^2

x^2 = 60

x = sqrt60

= 7.75 meters to nearest hundredth.

we would need a sample size of at least 502 for the approximate probability of the random interval (Y1/n - Y2/n) ‡ 0.05 covering pi - p2 to be at least 0.80.

To compute n, we can use the formula:
n = ((zα/2)^2 * 2p*(1-p*)) / (ε^2)
Where zα/2 is the z-score associated with a confidence level of 1-α, p* is the probability of success for a binomial distribution, and ε is the margin of error.
Since we are given that the approximate probability of the random interval (Y1/n - Y2/n) ‡ 0.05 covering pi - p2 is at least 0.80, we can set α = 0.20 to find the corresponding z-score of 1.28.
Using p* = 1/2 as an upper bound for both P1 and P2, we can calculate the margin of error as:
ε = zα/2 * sqrt((p*(1-p*)) / n)
Plugging in the values, we get:
0.05 = 1.28 * sqrt((0.25) / n)
Solving for n, we get:
n = 501.76
Therefore, we would need a sample size of at least 502 for the approximate probability of the random interval (Y1/n - Y2/n) ‡ 0.05 covering pi - p2 to be at least 0.80.

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The largest possible area of a square that can be made from any of the three pieces is \((400 cm)^{2}\)

To find the largest possible area of a square that can be made from any of the three similar bars of length 200 cm, 300 cm, and 360 cm, you need to first determine the greatest common divisor (GCD) of their lengths.

Step 1: Find the GCD of 200, 300, and 360.
The prime factorization of 200 is \((2^{3})(5^{2})\), of 300 is \((2^{2})(3)(5^{2})\), and of 360 is \((2^{3})(3^{2})(5)\). The GCD is the product of the lowest powers of common factors, which is \((2^{2})5=20\).

Step 2: Determine the side length of the largest square.
Since the bars are cut into equal pieces with a length of 20 cm (the GCD), the largest square will have a side length of 20 cm.

Step 3: Calculate the largest possible area of the square.
The area of the square can be found by multiplying the side length by itself: \(Area = (side)^{2}\).
\(Area = (20 cm)(20 cm) = (400 cm)^{2}\).

So, the largest possible area of a square that can be made from any of the three pieces is \((400 cm)^{2}\).

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If 1 book cost $7, 3 books will cost: 3*$7 = $21. (Multiplying)

The answer is $21.

Answer:

If your asking what plus 400 then it would be 564

Step-by-step explanation:

You had the first 2 numbers then subtract 400

564 is added with 400 to make 568 + 396 same as + 400.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

568 + 396 = x + 400

Solve for x.

568 + 396 = x + 400

Subtract 400 on both sides.

964 - 400 = x

x = 564

Thus,

568 + 396 is the same as 564 + 400.

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