What matrix equation models the system? Fill in the missing elements in the equation.

Could someone help me? im stuck ​

The length of DC is 24.

Pythagoras theorem states that for a right angled triangle, the square of the hypotenuse is the sum of the squares of base and altitude.

Given is a figure of a quadrilateral.

Given that EC = 13.

Then AE = 13, since the diagonals bisect each other.

AC = 13 + 13 = 26

AD = 10

Using Pythagoras Theorem,

(AC)² = (AD)² + (DC)²

26² = 10² + (DC)²

(DC)² = 26² - 10²

         = 576

DC = √576 = 24

Hence the length of the side DC is 24,.

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Answer:

below

Step-by-step explanation:

1/15 = 1 divided by 15 =  .06      (underlined part repeats)

Answer:

no solution

Step-by-step explanation:

2x+2x+2=4x+2

4x+2=4x+2

4x-4x=2-2

0=0

Answer:

x=8

Step-by-step explanation:

34=34, always true

The median of the data set is 75.80, rounded to two decimal places.

The mean of the data set can be calculated by adding up all the values and dividing by the number of values.

The formula is:

mean = (sum of all values) / (number of values)

For the given data set, mean = (59.8 + 61.4 + 69 + 71.2 + 78.7 + 83.5 + 89.6 + 94.1 + 84 + 75.2 + 79.7 + 83.6 + 74.8 + 74 + 83.3 + 73.8 + 90 + 68.3 + 71.7 + 74.2 + 69.3 + 68.5 + 71.3 + 78.5 + 73.2 + 91.4 + 78.7 + 56.4 + 73 + 65.6 + 69.9 + 73.8 + 80.1 + 78.7 + 75.8 + 66.7 + 79.7 + 66 + 73 + 85.3 + 72.1 + 78.5 + 79.9 + 75.6 + 71.3 + 69.6 + 58.6 + 64.3 + 63.2 + 79.9 + 70.1 + 80.4 + 88.2 + 79.4 + 74.6 + 65.2 + 70.6 + 77 + 73.2 + 81.5 + 83.3 + 77 + 82 + 78.5 + 75.4 + 78.5 + 73.6 + 86.8 + 74.4 + 65.2) / 60 = 6288.6 / 60 = 104.81

So, the mean of the data set is 104.81, rounded to two decimal places.

The median of the data set can be calculated by arranging the values in ascending order and finding the middle value. If there are an odd number of values, the median is the middle value. If there are an even number of values, the median is the average of the two middle values.

For the given data set, the median can be found as follows:

56.4 58.6 63.2 64.3 65.2 65.6 66 66.7 68.3 68.5 69 69.3 69.6 69.9 70.1 70.6 71 71.3 71.7 73 73 73.2 73.6 73.8 74 74 74.2 74.4 74.6 75.2 75.4 75.6 75.8 76.7 77 78 78.5 78.5 78.5 78.7 79 79.4 79.7 79.7 79.9 80.1 80.4 81.5 82 83 83.3 83.3 83.5 83.6 84 85.3 86.8 89.6 90 91.4 94.1

The median is 75.8.

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Answer:

20%

Step-by-step explanation:

To answer this question we have to 5% of 400, this will give us the number of managers!

1) 5% of 400

This gives us the answer!

Have a lovely day :)

The solution of the expression ( 7⁻²  x  7⁵ x  7⁻³ ) is equal to 1.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that the expression is ( 7⁻²  x  7⁵ x  7⁻³ ). The expression will be solved as below,

E = ( 7⁻²  x  7⁵ x  7⁻³ )

E = 7⁽ ⁻²⁺⁵⁻³⁾

E = 7⁽⁻⁵⁺⁵⁾

E = 7⁰

E =1

Hence, the solution of the expression ( 7⁻²  x  7⁵ x  7⁻³ ) is equal to 1.

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The last term of the missing pattern is 57.

A sequence is a list of items where repetitions are allowed and hierarchy is crucial. The same as a set, it has members. The number of items determines how long the sequence is.

Given:

Sequence: 7,11,2,18,-7

As, the difference between the first two-term is 4,

while in the next two-term is 16(4²),

So, in the next two-term the difference will be equal to 64(4³).

Then, the last term is

x- (-7)= 64

x+ 7= 64

x= 57

Hence, the last term is 54.

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The magnitude and direction of the force C are 93.853 pounds-force and  281.237°, respectively.

In this problem we find the case of a system at equilibrium and formed by 3 vectors, of which we must determine the magnitude and direction of a force must be determined. Vectors are described by two features: (i) Magnitude, (ii) Direction.

The magnitude is obtained by Pythagorean theorem:

F = √(x² + y²)

The direction is determined by inverse trigonometric functions:

θ = tan⁻¹ (y / x)

Besides, the system can be described physically by Newton's laws and mathematically by vector sum:

F₁(x, y) + F₂(x, y) + F₃(x, y) = (0, 0)

First, determine the vector associated to force C:

F₃(x, y) = - F₁(x, y) - F₂(x, y)

F₃(x, y) = - (- 92 · cos 45°, 92 · sin 45°) - (54 · cos 30°, 54 · sin 30°)

F₃(x, y) = - (- 46√2, 46√2) - (27√3, 27)

F₃(x, y) = (46√2, - 46√2) - (27√3, 27)

F₃(x, y) = (46√2 - 27√3, - 46√2 - 27)

Second, calculate the magnitude of force C:

F₃ = √[(46√2 - 27√3)² + (- 46√2 - 27)²]

F₃ ≈ 93.853

Third, determine the direction of force C:

θ = tan⁻¹ [(- 46√2 - 27) / (46√2 - 27√3)]

θ ≈ 281.237°

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Answer:

  F₃ = 94 lb at 78.8° below the +x axis

Step-by-step explanation:

You want the magnitude of force F₃ that makes the sum of forces be zero.

As you have already noted, the sum of forces is zero when the system is at equilibrium.

  F₁ +F₂ +F₃ = 0

  F₃ = -(F₁ +F₂)

The forces F₁  and F₂ can be added by adding their horizontal and vertical components.

  F₁ = 92(cos(135°), sin(135°)) ≈ (-65.0538, 65.0538)

  F₂ = 54(cos(30°), sin(30°)) ≈ (46.7654, 27)

Then the sum of forces is ...

  F₁ +F₂ ≈ (-18.2884, 92.0538) . . . . . sum of corresponding parts

As we noted above, F₃ is the opposite of the sum, so is ...

  F₃ = (18.2884, -92.0538)

The magnitude is found using the Pythagorean theorem:

  |F₃| = √(18.2884² +(-92.0538)²) ≈ √8808.3677 ≈ 93.8529

The magnitude of F₃ is about 94 lb.

The components of F₃ tell you the force is in the 4th quadrant. The ratio of the x- and y-components is the tangent of the angle:

  θ = arctan(y/x) = arctan(-92.0538/18.2884) = arctan(-5.03345)

  θ ≈ -78.763°

In the first attachment, the sum of forces F₁ +F₂ is shown by the black arrow. The direction of F₃ will be the opposite of that arrow's direction, so will be down to the right, about 78.8° below the +x axis. The second attachment shows the magnitude and direction of F₃, where 0° is the direction of the +x axis.

__

Additional comment

For finding the magnitude of the sum of two forces, the Law of Cosines is another way to do it. To use that, you need to know the angle between the two forces. That's the angle at lower right inside the triangle shown in the first attachment. It is 75°. Then the magnitude is ...

  |F₃| = √(54² +92² -2·54·92·cos(75°)) ≈ √8808.37 ≈ 93.853 . . . . lb

This math can be simpler than working with the x- and y-components of the forces.

The angle of F₃ is another matter. Finding that requires solving the force triangle for one of the other interior angles, then adding the angles in the appropriate way.

For example, the angle at the origin can be found from the Law of Sines as ...

  α = arcsin(92/93.853·sin(75°)) ≈ 71.237°

Adding this to the angle of the red vector (30°) gives the resultant angle relative to the +x axis of 101.237°. The direction of F₃ is opposite this, so is ...

  101.237° -180° = -78.763° . . . . as above

As you can see from the attachments, a vector calculator or spreadsheet is a useful tool for finding sums of forces from their magnitude and direction.

Just to be clear, the conversion between polar and rectangular forms is ...

  (x, y) = r(cos(θ), sin(θ))

  r = √(x² +y²)

  θ = arctan(y/x) . . . . . with attention to quadrant

Spreadsheets and some calculators have an ATAN2(x, y) function that takes the signs into account when it computes the angle. When working with angles, make sure the calculator's angle mode is set to degrees or radians appropriately. (Spreadsheets usually use radians.)

Answer: Without more information about the outstanding balance on your mortgage and the exact terms of the new mortgage, it is not possible to determine the answer to your question. The amount of the monthly payments and the total amount of interest paid over the life of the loan will depend on these factors. But here a way you can do it.

Step-by-step explanation:

First, determine the outstanding balance on the original mortgage by calculating the total payments made over the past five years and subtracting them from the original loan amount. To do this, multiply the monthly payment amount by the number of months in five years (60) to find the total payments made.

Next, calculate the new monthly payment amount on the refinance mortgage by using a mortgage calculator or the formula: M = P[r(1+r)^n]/[(1+r)^n-1], where M is the monthly payment, P is the outstanding balance from step 1, r is the interest rate (0.06625), and n is the number of payments (360 for a 30-year mortgage).

Compare the new monthly payment amount to the original monthly payment amount to see how much you will save or pay more each month.

Consider any fees or closing costs associated with refinancing and factor those into the decision to refinance.

If the savings from the lower interest rate outweigh the costs of refinancing, it may be a good decision to move forward with the refinance.

A polynomial function is a function in an equation, such as the quadratic equation, cubic equation, etc.

A polynomial is an expression in mathematics that solely uses the operations of addition, subtraction, multiplication, and powers of positive-integer variables. It consists of indeterminates and coefficients.

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Answer:

  304 in²

Step-by-step explanation:

You want the surface area of a rectangular prism with dimensions 4 in, 8 in, and 10 in.

The area of a rectangular prism is given by the formula ...

  A = 2(LW +H(L +W))

Using the given dimensions, the area is ...

  A = 2(4·8 +10(4+8)) = 2(32 +120) = 304 . . . . square inches

The area of the box is 304 square inches.

Answer: The relationship between the variables x and y in the given data points is linear.

Step-by-step explanation: A linear relationship is one in which the change in the y-value (output) is always the same for a given change in the x-value (input), regardless of the starting point. In other words, the slope of the line is constant.

In this case, the slope of the line can be calculated by finding the difference in y-values for a given difference in x-values between two points. We can pick any two points, for example:

(X: -6, Y: 12) and (X: 6, Y: 20)

The slope can be calculated by:

m = (20 - 12) / (6 - (-6)) = 8/12 = 2/3

This means that for every 1 unit increase in x, y increases by 2/3 units.

This is a linear relationship.

In contrast, in an exponential relationship, the y-value increases (or decreases) at a constantly increasing (or decreasing) rate as the x-value increases.

the answer to this question is 4,5,6

The difference between two events that are 300s apart on clock A will also be 300s apart on clock B and clock C when clock A reads 380s. The time difference between events is independent of the reading on any individual clock.

The time on any of these clocks is a straight-line function of that on another, with slopes 1 and y-intercepts. Use the equation of the straight line to calculate the above quantities.

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor.

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E ∪ F and E' ∩ F' are not mutually exclusive events.

If two things can't happen at the same moment, they are mutually exclusive. Disjoint is another word that denotes mutual exclusion. When two occurrences are unrelated, there is no chance that both will happen at the same moment.

Given:

S= {1, 2, 3}

and E= {1}, F= {2, 3}

We know that the union contain all elements of sets.

E ∪ F = {1, 2, 3} = S

and. E' = S - E

            = {2, 3}

and, F'= S - F

          = {1}

Now, intersection contain the common elements of both sets

Then, E' ∩ F' = {1, 2, 3}

As, E ∪ F = E' ∩ F' are not mutually exclusive events.

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If a/2-b/3 = 1, then we can write:

2(a/2-b/3) = 2

Combining like terms, we have:

a - b/3 = 1

Multiply both sides by 3 to get:

3a - b = 3

Now, we can add b to both sides of the equation:

3a = b + 3

Finally, we can divide both sides by 3 to get:

a = (b + 3)/3

Now we can substitute this value of a into the original equation

2a + 3b = 2(b + 3)/3 + 3b = 2b/3 + 6/3 + 3b = 2b + 2 + 3b = 5b + 2

So 2a+3b = 5b + 2 in terms of b

Answer:

Check: 198+214+764 = 1176 total rooms

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

Explanation

I'll define these variables:

We have these given facts:

Fact 1 allows us to form the equation c = p+16

Fact 2 allows us to form the equation m = 4p-28

Fact 3 leads to the equation p+c+m = 1176

Let me know if you have any questions about how I formed the equations.

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

The system of equations is:

[tex]\begin{cases}c = p+16\\m = 4p-28\\p+c+m = 1176\\\end{cases}[/tex]

Notice how the first two equations have the variable p on the right hand side, and no other variable. We'll use this to apply substitution and solve for p.

p+c+m = 1176

p+(p+16)+m = 1176 ... replace c with p+16

p+(p+16)+(4p-28) = 1176 ... replace m with 4p-28

6p-12 = 1176

6p = 1176+12

6p = 1188

p = 1188/6

p = 198

Use this value of p to find the other variables.

c = p+16 = 198+16 = 214

m = 4p-28 = 4*198-28 = 764

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

Summary:

We found that p = 198, c = 214, and m = 764.

As a check,

198+214+764 = 1176 total rooms

The answer is confirmed.

A linear function rule to model the distance in feet {d} the car has traveled any number of seconds {t} after passing the timing device is

d = 92t.

Given is that a car moving at a constant speed passed a timing device at t = 0 s. After 9s, the car has traveled 828 ft.

We can write the linear function as -

y = mx

Now, we can write the slope as -

{m} = (828/9) = 92

So -

d = 92t

Therefore, a linear function rule to model the distance in feet {d} the car has traveled any number of seconds {t} after passing the timing device is

d = 92t.

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Our assumption that m II  is intersected by a transversal n is wrong, thus none of the set of angles are supplementary to 108°.

A transversal in geometry is a line that intersects two other lines in the same plane at two different locations. It is possible to determine whether two or more other lines in the Euclidean plane are parallel by using transversals.

A line that crosses two lines in the same plane at two different geometric locations is referred to as a transversal. The angles that result from a transversal crossing of two lines in pairs can be successive internal angles, matching angles, or alternate angles.

The transversal angles. There are numerous angles created when a transversal splits two parallel lines. They are referred to as transversal angles.

Given, ∠1 = 70°

∠7 = 80°

Vertically opposite angles are equal.

∠1 = ∠3

⇒ ∠1 = ∠3 = 70°

As per the diagram, line 1 is intersected by line n.

Vertically opposite angles are equal.

∠5 = ∠7

=> ∠5 = ∠7 = 80°

Let m II l is intersected by a transversals n.

Then the pair of corresponding angles should be equal. i.e.,

∠1 = ∠5

= ∠3 = ∠7

but ∠1 = 70

and ∠5 = 80°

Therefore, our assumption that m II  is intersected by a transversal is wrong.

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The range of ants to eat is 20,000-1,00,000 ants.

The difference between the highest and lowest values for a particular data collection is the range in statistics. For instance, the range will be 10 - 2 = 8 if the provided data set is 2, 5, 8, 10, and 3.

As a result, the range may alternatively be thought of as the distance between the highest and lowest observation. The range of observation is the name given to the outcome. Statistics' range reflects the variety of observations.

The answer is given below:

If each ant is of 1 mg:

1g = 1000 mg = 1000 ants

100g = 100000 mg = 100000 ants

=> Maximum 105 ants

Now if one ant is of 5 mg:

1g = 1000mg = 1000/5 = 200 ants

100g = 20000 ants

Minimum 20,000 ants

Hence the range of ants to eat is 20,000-1,00,000 ants.

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Answer:

sinB= 3.8(sin16/2.4) or ~0.45162

[Note: ~ means about]

Step-by-step explanation:

To solve this problem, we need to use the Law of Sines. The Law Of Sines states that sinA/a = sinB/b. Since we know the value of A,a, and b, we can plug our known values in to find our unknown value, sinB.

sinA/a = sinB/b   [Plug in known values]

sin16/2.4 = sinB/3.8

Now, we want to just find the value of sinB. To do this, we will need to multiply both sides by 3.8, so the right side just reads sinB.

sin16/2.4 = sinB/3.8   [Multiply by 3.8]

3.8(sin16/2.4) = sinB

Now, if we want the exact answer, we can leave it as is. If you are looking for a decimal answer, let's continue to see what we would get:

3.8(sin16/2.4) = sinB

3.8(0.27563/2.4) ~ sinB

3.8(0.11484) ~ sinB

0.43642 ~ sinB

B ~ 0.45162

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The total bill is  $36.87, which you can pay using one $20 bill, one $10 bill, one $5 bill, one $1 bill, and 0.87 in pennies to avoid getting any pennies back.

Let's calculate and add the 6% (sales tax)

[tex]34.78 x 0.06 = 2.08\\\\34.78 + 2.08 = 36.86[/tex]

This can be rounded to $36.87.

Considering the available bills, the best option to pay without getting pennies is :

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The series of transformations of the figure will be rotation, reflection, and translation shown in the figure.

A point, line, or mathematical figure can be converted in one of four ways, and each has an effect on the object's structure and/or position.

Rotation does not change the shape and size of the geometry. But changes the orientation of the geometry.

The translation does not change the shape and size of the geometry. But changes the location.

The reflection does not change the shape and size of the geometry. But flipped the image.

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The true diameter of the Venus given the angular diameter of 0.018 is about 39.7 million km.

An angular distance used to describe how big a sphere or circle seems from a certain point of view is known as the angular diameter, angular size, apparent diameter, or apparent size. It is known as the visual angle in the vision sciences and as the angular aperture in optics (of a lens). The angular diameter may also be thought of as the angle that a camera or eye must spin around in order to view from one side of an apparent circle to the other.

Given that the angular diameter of Venus is 0.018 degrees.

The true diameter of the planet is calculate using the following formula:

diameter = distance (angular diameter / 57.3)

Substitute the value of distance = 38.5 million and angular diameter = 0.018 degrees.

diameter = 38.5 * 10^6 (0.018 / 57. 3)

diameter = 39. 7 million

Hence, the true diameter of the Venus given the angular diameter of 0.018 is about 39.7 million km.

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Answer:

x = 4y/5 + 9/5

y = 5x/4 - 9/4

Step-by-step explanation:

5x - 4y = 9  ==> solve for x

5x = 4y + 9  ==> add 4y on both sides to isolate x

x = (4y + 9) / 5  ==> divide both sides by 5 to isolate x

x = 4y/5 + 9/5  ==> distribution property

5x - 4y = 9  ==> solve for y

5x = 4y + 9  ==> add 4y on both sides to make y positive

5x - 9 = 4y  ==> subtract 9 on both sides to isolate y

y = (5x - 9) / 4  ==> divide both sides by 4 to isolate y

y = 5x/4 - 9/4  ==> distribution property

For P - value = 0.18, there is not sufficient evidence that more than 50% of city residents supports the tax increase. So, the right answer of this problem is option ( c ).

Hypothesis testing is a statistical method utilized to make a decision about a population, with results from a set of sampled data from said population. We consider the assumptions as the null hypothesis, or H and alternative hypothesis, that is, the hypothesis we wish to examine whether it was true or not. Using the sampled data, we can calculate the test statistic, and obtained what is known as the P-value. The P-value is used to draw a convenient vasis conclusions in hypothesis-testing and is often referred to as the observed significance level of the test. We have, survey as a random sample of 300 city residents and use the results to test the following hypotheses:

H₀ : p = 0.50

Hₐ : p>0.50

where p is proportion of all city residents who support a 1% increase in the sales tax to fund road repairs and p-hat ( sample proportion) = 158/300 = 0.52 , P - value = 0.18. Now, we check the options and try to draw the conclusion. P-value is the probability where the population proportion (p) is more extreme than sample proportion ( p-hat). but p-hat > p , i.e, P value is large, we fail to reject null hypothesis. So, There is not sufficient evidence to support null hypothesis. The option (c) is correct.

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Answer:

  (x, y, z) = (-2, 5, 3)

Step-by-step explanation:

You want an algebraic solution to the system of equations ...

The second equation suggests an expression for x:

  x = 2y -5z +3

Substituting this into the first and third equations, we have ...

  2(2y -5z +3) +3y -4z = -1   ⇒   7y -14z = -7   ⇒   y -2z = -1

  -4(2y -5z +3) +y +z = 16   ⇒   -7y +21z = 28   ⇒   y -3z = -4

These equations are reduced to standard form by dividing by the leading coefficient.

Subtracting the second of these equations from the first, we have ...

  (y -2z) -(y -3z) = (-1) -(-4)

  z = 3 . . . . . . . simplify

The first of these reduced equations tells us ...

  y = 2z -1 = 2(3) -1 = 5

And our original substitution equation says ...

  x = 2y -5z +3 = 2(5) -5(3) +3 = -2

The solution is (x, y, z) = (-2, 5, 3).

__

Additional comment

A calculator confirms this solution. The "work" is entering the correct coefficients into the appropriate calculator function, then interpreting the result.