Matrix Products : consider the matricesA = 1 2 1 B = 10 5 4 8 C= 5 63 4 3 9 4 10 1 8 97 8 7 5 4 610 4Of the possible matrix products ABC,ACB,BAC,BCA,CAB,CBA, which make sense? A. ( ACB, BAC, CAB ) only B. ( ABC, BCA, CAB ) only C. ( ACB, BAC, CBA ) only D. all of them E. none of them

Answer:

Set your calculator to degree mode.

Please draw the figure to confirm my answer.

[tex] \tan( \alpha ) = \frac{15}{24} [/tex]

[tex] \alpha = {tan}^{ - 1} \frac{5}{8} = 32 \: degrees[/tex]

So the angle of elevation is 32°.

D is the correct answer.

4√5 is the simplified form of  square root of 10 times square root of 8 .

First, The square root of ten is √10

and, the square root of 8 is √8

Now, simplify square root of 10 times square root of 8.

= √10×√8

By radical property (√a×√b=√a×b

So,√10×√8=√(10×8)=√80

=√16×5

=4√5

Thus, 4√5 is the simplified form of  square root of 10 times square root of 8 .

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The required answer is E(X) = 1.4

The expected value E(X) for this distribution can be calculated by multiplying each possible value of X by its probability, and then adding up these products. Using the table provided, we have:

E(X) = (0)(0.2) + (1)(0.3) + (2)(0.4) + (3)(0.1) = 0 + 0.3 + 0.8 + 0.3 = 1.4

Therefore, the closest option to our calculated expected value is option A, 1.2. However, none of the given options match exactly with our calculation.

To find the expected value E(X) of the discrete random variable X, we need the probability distribution table for X. However, the table is not provided in the question. Please provide the table with the probabilities for each possible value of X, and I will be happy to help you calculate the expected value E(X).

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(a) the set of all products in which the exponents sum to 4 is (1 + x + x²)4.

(b) the set of all products in which the exponents sum to 4 is (1 + x + x² + x³ + x⁴)4.

(c) the set of all products in which the exponents sum to 4 is (1 + x³ + x⁴)2(1 + x + x²)2.

(d) the set of all products in which the exponents sum to 4 is (1 + x + x² + x³ ......)3.

An exponent is written as a superscript to the right of the base number and indicates the number of times the base number is multiplied by itself.

(a) The set of all formal products in which the exponents sum to 4 can be determined by the following equation: (1 + x + x²)4.

This is because the exponents of each term must sum to 4, thus the exponents of the terms in the product must also sum to 4. Thus, the set of all products in which the exponents sum to 4 is (1 + x + x²)4.

(b) The set of all formal products in which the exponents sum to 4 can be determined by the following equation: (1 + x + x² + x³ + x⁴)4.

This is because the exponents of each term must sum to 4, thus the exponents of the terms in the product must also sum to 4. Thus, the set of all products in which the exponents sum to 4 is (1 + x + x² + x³ + x⁴)4.

(c) The set of all formal products in which the exponents sum to 4 can be determined by the following equation: (1 + x³ + x⁴)2(1 + x + x²)2.

This is because the exponents of each term must sum to 4, thus the exponents of the terms in the product must also sum to 4. Thus, the set of all products in which the exponents sum to 4 is (1 + x³ + x⁴)2(1 + x + x²)2.

(d) The set of all formal products in which the exponents sum to 4 can be determined by the following equation: (1 + x + x² + x³  ......)3.

This is because the exponents of each term must sum to 4, thus the exponents of the terms in the product must also sum to 4. Thus, the set of all products in which the exponents sum to 4 is (1 + x + x² + x³ ......)3.

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Answer:

6. From speed vs. time graphs, we know that in order to find the distance, we need to look at the area covered. Given the rectangular shape below, we know that it would be A=lw so A=60mph(2.5h).

7. A=60mph(2.5h)= 150 miles.

Answer:

The function represents a growth. The percentage rate is 9%.

Step-by-step explanation:

f(x)= a(1+r)^t

f(x) 7900 (1+.09)^x

Using the above equations, since the rate is greater than 1, that means the function represents growth. And to find the percentage rate, take the .09 and multiply it by 100 to convert it into a percentage.

The thing that I notice about the ratios of the lengths of the intersected segments as you move B and C is that the ratios is altered (changed) as the position of D changes, but the two ratios was one that remain equal to each other.

If triangle and a line goes through two sides of the triangle, the line cuts the sides into littler line sections. When we choose any point on the line, the lengths of the smallest line fragments it makes will change. But, the proportion between the lengths of the littler line portions will continuously remain the same.

For case, in the event that one of the smaller line segments is twice as long as another, at that point this proportion will continuously be 2:1, no matter where we choose the point on the line.

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Answer:

Step-by-step explanation:

0.7 cubic kilometers

V= lwh

V=(.5)(2)(.7)

If n is a vector normal to the tangent plane of the surface F(x,y,z) = 0 at a point, then option (C) the gradient of F is orthogonal to n.

The gradient of F at a point (x₀, y₀, z₀) is defined as the vector (∂F/∂x, ∂F/∂y, ∂F/∂z) evaluated at that point. This gradient vector is perpendicular (or orthogonal) to the level surface of F passing through that point.

The tangent plane to the surface F(x, y, z) = 0 at a point (x₀, y₀, z₀) is defined as the plane that touches the surface at that point and is perpendicular to the normal vector at that point.

Thus, if n is a vector normal to the tangent plane of the surface F(x, y, z) = 0 at a point (x₀, y₀, z₀), then n is perpendicular to the tangent plane. Since the gradient vector of F at the point (x₀, y₀, z₀) is perpendicular to the tangent plane, it is also perpendicular to n.

Therefore, the correct answer is (C) The gradient of F is orthogonal to n.

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The given equation is rearranged to obtain 9x - 1 - (41 - 5x) = 0. By simplifying and solving the equation, we get x = 3.

To solve this equation, we first simplify it by subtracting what is to the right of the equal sign from both sides of the equation. This gives us 9x - 1 - 41 + 5x = 0, which simplifies to 14x - 42 = 0. We then pull out the like factor of 14 to obtain 14(x - 3) = 0.

Next, we use the zero product property to find the values of x that make the equation true. We know that 14 can never equal 0, so we focus on the expression inside the parentheses. Setting x - 3 equal to 0, we get x = 3.

Therefore, the solution to the given equation is x = 3.

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Complete Question:

Simplify 9x-1=41-5x.

If the marginal propensity to consume(mpc) = 4/5 then the government purchases multiplier is 5. Therefore, the answer is (d) 5.

The marginal propensity to consume (MPC) is the fraction of each additional unit of income that is spent on consumption. In other words, it is the change in consumption that results from a one-unit change in income.

The government purchases multiplier is a measure of the impact that changes in government purchases of goods and services have on the overall economy. It is the ratio of the change in the equilibrium level of real GDP to the change in government purchases.

The government purchases multiplier (K) is calculated using the formula:

K = 1 / (1 - MPC)

where MPC represents the marginal propensity to consume.

In this case, the MPC is given as 4/5, so we can substitute this value into the formula:

K = 1 / (1 - 4/5)

= 1 / (1/5)

= 5

Therefore, the government puchases multiplier is 5. Therefore, the answer is (d) 5.

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The limit of the sequence an = [(ln(n))²]/(3n) using L'Hôpital's Rule is 0.

We can apply L'Hôpital's Rule to find the limit of the given sequence:

an = [(ln(n))²]/(3n)

Taking the derivative of the numerator and denominator with respect to n:

an = [2 ln(n) * (1/n)] / 3

Simplifying:

an = (2/3) * (ln(n)/n)

Now taking the limit as n approaches infinity:

lim n->∞ an = lim n->∞ (2/3) * (ln(n)/n)

We can again apply L'Hôpital's Rule:

lim n->∞ (2/3) * (ln(n)/n) = lim n->∞ (2/3) * (1/n) = 0

Therefore, the limit of the sequence is 0.

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The linear differential operator that annihilates [tex]e^{-x} + 2xe^x - x^2e^x is (D - 2)(D - 1)(D + 1).[/tex]

For [tex]1+6x - 2x^3:[/tex]

The first derivative is [tex]6 - 6x^2[/tex], and the second derivative is -12x. Since the second derivative is a constant multiple of the original function, we can use the differential operator D - 2 to annihilate the function:

[tex](D - 2)(1 + 6x - 2x^3) = D(1 + 6x - 2x^3) - 2(1 + 6x - 2x^3)[/tex]

[tex]= (6 - 6x^2) - 2 - 12x + 4x^3 - 2[/tex]

[tex]= 4x^3 - 6x^2 - 12x + 4[/tex]

[tex]For e^{-x} + 2xe^x - x^2e^x:[/tex]

The first derivative is [tex]2e^x - 2xe^x - x^2e^x,[/tex] and the second derivative is [tex]-2e^x + 2xe^x + 2e^x - 2xe^x - 2xe^x - x^2e^x[/tex]. Simplifying, we get:

[tex](D - 2)(D - 1)(D + 1)(e^{-x} + 2xe^x - x^2e^x) = (D - 1)(D + 1)(2e^x - 2xe^x - x^2e^x)[/tex]

[tex]= (D + 1)(2e^x - 4xe^x - 2xe^x + 2x^2e^x - x^2e^x)[/tex]

[tex]= (D + 1)(2e^x - 6xe^x + 2x^2e^x)[/tex]

Therefore, the linear differential operator that annihilates [tex]e^{-x} + 2xe^x - x^2e^x is (D - 2)(D - 1)(D + 1).[/tex]

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Expression is not equal to zero, we cannot find a vector field G such that curl G = (xyz, -y⁶z⁵, y⁵z⁶). Therefore, the answer is no.

There is no such G because the divergence of curl G is not equal to zero. The divergence of curl G is given by the scalar triple product identity:

div(curl G) = dot(grad, curl G)

Using this identity and the given components of curl G, we have:

div(curl G) = x(∂/∂x)(-y⁶z⁵) + y(∂/∂y)(y⁵z⁶) + z(∂/∂z)(xyz)
div(curl G) = -6xy⁵z⁵ + 5y⁶z⁵ + xz

Since this expression is not equal to zero, we cannot find a vector field G such that curl G = (xyz, -y⁶z⁵, y⁵z⁶). Therefore, the answer is no.

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Answer:

$365.00.

Step-by-step explanation:

To compute the area of the transformed ellipse T(S), A transformed ellipse is an ellipse that has been subjected to a transformation, which can change its size, shape, and orientation.

We'll follow these steps:
1. Identify the original ellipse S and its area.
2. Apply the transformation T(x) = Ax.
3. Compute the determinant of matrix A.
4. Compute the area of the transformed ellipse T(S) using the determinant.

Step 1: The original ellipse S has an area of 11.
Step 2: The transformation T(x) = Ax is given by the matrix A = [1 2; 0 -6].
Step 3: Compute the determinant of matrix A.
The determinant is given by det(A) = (1 * -6) - (2 * 0) = -6.
Step 4: Compute the area of the transformed ellipse T(S) using the determinant.
The area of the transformed ellipse T(S) can be computed using the formula:

Area(T(S)) = |det(A)| * Area(S).
Area(T(S)) = |-6| * 11 = 6 * 11 = 66.

The area of the transformed ellipse T(S) is 66.

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Answer:

x = 12

Step-by-step explanation:

{22, 14, 12}

2x = 24

2(22) = 44

2(14) = 28

2(12) = 24

(a). 40,320 different arrangements can be made arranging the letters of FABULOUS.

(b). 5,760 different arrangements have the A appearing anywhere before the S (such as in FABULOUS).

(c). 1,440 different arrangements have the first U appearing anywhere before the S (such as in FABU- LOUS).

(d). 120 different arrangements have all four vowels appear consecutively (such as FAUOUBLS).

(a). The word FABULOUS has 8 letters, so there are 8! = 40,320 different arrangements of its letters.

(b). To count the number of arrangements where A appears before S, we can fix A in the first position and S in the last position. Then, we have 6 remaining letters to arrange in the 6 remaining positions. This gives us 6! = 720 possible arrangements where A appears before S.

However, we can also fix A in the second position and S in the last position, and we can fix A in the third position and S in the last position, and so on. Therefore, the total number of arrangements where A appears anywhere before S is 720 * 8 = 5,760.

(c). To count the number of arrangements where the first U appears before S, we can fix U in the first position and S in the last position, and then we have 6 remaining letters to arrange in the 6 remaining positions. This gives us 6! = 720 possible arrangements where the first U appears before S.

However, there are two U's in the word FABULOUS, so we can also fix the second U in the first position and S in the last position, and then we have 6 remaining letters to arrange in the 6 remaining positions. This also gives us 6! = 720 possible arrangements where the first U appears before S. Therefore, the total number of arrangements where the first U appears anywhere before S is 720 * 2 = 1,440.

(d). To count the number of arrangements where all four vowels appear consecutively, we can group the vowels together as one unit, so we have F, B, L, S, and the group AUOU. The group AUOU has 4 letters, so there are 4! = 24 different arrangements of these letters.

However, the group AUOU can appear in any of the 5 positions between F and B, between B and L, between L and S, after S, or before F. Therefore, the total number of arrangements where all four vowels appear consecutively is 24 * 5 = 120.

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(a) The ball is 3 feet high when it leaves the child's hand.                      

(b) The maximum height of the ball is 75 feet.

(c) The ball strikes the ground approximately 91.6 feet from the child

(a) To find the height of the ball moving in a projectile motion when it leaves the child's hand, we need to substitute x = 0 into the equation and solve for y:

[tex]y = -1/16(0)^2 + 6(0) + 3[/tex]

y = 3

Therefore, the ball is 3 feet high when it leaves the child's hand.

(b) To find the maximum height of the ball, we need to find the vertex of the parabola defined by the equation. The x-coordinate of the vertex is given by:

x = -b / (2a)

where a = -1/16 and b = 6. Substituting these values, we get:

x = -6 / (2(-1/16)) = 48

The y-coordinate of the vertex is given by:

[tex]y = -1/16(48)^2 + 6(48) + 3 = 75[/tex]

Therefore, the maximum height of the ball is 75 feet.

(c) To find how far from the child the ball strikes the ground, we need to find the value of x when y = 0 (since the ball will be at ground level when its height is 0).

Substituting y = 0 into the equation, we get:

[tex]0 = -1/16x^2 + 6x + 3[/tex]

Multiplying both sides by -16 to eliminate the fraction, we get:

[tex]x^2 - 96x - 48 = 0[/tex]

Using the quadratic formula, we can solve for x:

[tex]x = [96 \ ^+_- \sqrt{(96^2 - 4(-48))}]/2\\x = [96\ ^+_- \sqrt{(9408)}]/2\\x = 48 \ ^+_- \sqrt{(2352)[/tex]

x ≈ 4.4 or x ≈ 91.6

Since the ball is thrown from x = 0, we can discard the negative solution and conclude that the ball strikes the ground approximately 91.6 feet from the child.

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c = 1/2, and the pdf is fx(x) = { 1/2 [tex](1-x^{2} )^{-1}[/tex], −1 ≤ x ≤ 1or 0 otherwise and cdf of X is: FX(x) = { 0, x ≤ -1 or -1/2 [tex]tan^{-1}(x/\sqrt{1-x^{2} )}[/tex] + 1/2, -1 < x < 1 or 1 ,x ≥ 1

(a) To find c, we need to integrate the pdf over its support and set the result equal to 1 since the pdf must integrate to 1 over its entire support. Therefore, we have:

1 = ∫c [tex](1-x^{2} )^{-1}[/tex] dx from -1 to 1

Using the substitution u = 1 - [tex]x^{2}[/tex], we have:

1 = c∫ [tex]u^{-1/2}[/tex] dx from 0 to 1

Solving the integral, we get:

1 = 2c

Therefore, c = 1/2, and the pdf is:

fx(x) = {

1/2 [tex](1-x^{2} )^{-1}[/tex] , −1 ≤ x ≤ 1

0 otherwise

To sketch the pdf, we can notice that it is symmetric about x = 0 and that it approaches infinity as x approaches ±1. Therefore, it will have a peak at x = 0 and decrease as we move away from x = 0 in either direction.

(b) To find the cdf of X, we can integrate the pdf from negative infinity to x for each value of x in the support of the pdf. Therefore, we have:

FX(x) = ∫fX(t) dt from -∞ to x

For x ≤ -1, FX(x) = 0, since the pdf is zero for x ≤ -1. For -1 < x < 1, we have:

FX(x) = ∫1/2 [tex](1-t^{2} )^{-1}[/tex] dt from -1 to x

Using the substitution u = [tex]t^{2}[/tex] - 1, we have:

FX(x) = -1/2 ∫[tex](x^{2} -1)^{-1/2}[/tex] du

Solving the integral, we get:

FX(x) =  -1/2 [tex]tan^{-1}(x/\sqrt{1-x^{2} )}[/tex]  + 1/2

For x ≥ 1, we have FX(x) = 1, since the pdf is zero for x ≥ 1. Therefore, the cdf of X is:

FX(x) = {

0 x ≤ -1

-1/2 [tex]tan^{-1}(x/\sqrt{1-x^{2} )}[/tex]  + 1/2 -1 < x < 1

1 x ≥ 1

To sketch the cdf, we can notice that it starts at 0 and increases gradually from x = -1 to x = 1, where it jumps to 1. The cdf is also symmetric about x = 0, similar to the pdf.

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Answer:

Step-by-step explanation:

therefore favourable/total outcomes

hope it helps

The function f is not a function from r to r since none of the given functions are functions from r to r due to either being undefined for certain inputs or having multiple outputs for a single input.

a) f(x) = 1/x

f is not a function from R to R because it is undefined when x = 0. For f to be a function from R to R, it must have a defined output for every real number input.

b) f(x) = √x

f is not a function from R to R because the square root is not defined for negative numbers. Thus, it doesn't have an output for negative real number inputs.

c) f(x) = ±√(x² + 1)

f is not a function from R to R because it violates the definition of a function, which states that each input must have exactly one output. In this case, each input x has two outputs: the positive and negative square roots of (x² + 1).

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Answer:

use Pythagorean theorem

Step-by-step explanation:

:)

a^2+b^2=c^2 if equal triangle is right!

Answer:

7. No.  8. Yes.

Step-by-step explanation:

Use the pythagorean theorem.

[tex]a^{2} + b^2 = c^2[/tex]

Where a and b are legs and c is the hypotenuse.

7.

[tex]3^2 + 7^2 \neq \sqrt{57}^2 \\9 + 49 = 58 \neq 57[/tex]

So it isn't a right triangle.

8.

[tex](5\sqrt{5})^2 = 11^2 + 2^2\\(\sqrt{125})^2 = 121 + 4\\125 = 125[/tex]

So this is a right triangle.

Answer: both

Step-by-step explanation:

The trigonometric identity [sint + cost]²/sin(t)cos(t) = 2 + csc(t)sec(t).

Trigonometric identities are mathematical equations that contain trigonometric ratios.

Since we have the trigonometric identity

[sint + cost]²/sin(t)cos(t) = 2 + csc(t)sec(t). We want to show that the left-hand-side L.H.S = right-hand-side R.H.S. We proceed as folows

Since we have L.H.S = [sint + cost]²/sin(t)cos(t), so expanding the numerator, we have that

[sint + cost]²/sin(t)cos(t), = [sin²t + 2sintcost + cos²(t)]/sin(t)cos(t)

Using the trigonometric identity sin²t + cos²t = 1, we have that

[sin²t + 2sintcost + cos²(t)]/sin(t)cos(t) =  [sin²t + cos²(t) + 2sintcost]/sin(t)cos(t)

=  [1 + 2sintcost]/sin(t)cos(t)

Dividing through by the denominator sin(t)cos(t) , we have that

[1 + 2sintcost]/sin(t)cos(t) = [1/sin(t)cos(t) + [2sintcost]/sin(t)cos(t)

= 1/sin(t) × `1/cos(t) + 2

= cosec(t)sec(t) + 2  [since cosec(t) = 1/sin(t) and sec(t) = 1/cos(t)]

= 2 +  cosec(t)sec(t)

= R.H.S

Since L.H.S = R.H.S

So, the trigonometric identity [sint + cost]²/sin(t)cos(t) = 2 + csc(t)sec(t).

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Answer:

Step-by-step explanation:

The arithmetic mean of 18 and 128 is (18+128)/2 = 73.

The geometric mean of 18 and 128 is the square root of their product: √(18*128) = √(2304) = 48.

So, the difference between the geometric mean and the arithmetic mean is:

48 - 73 = -25.

Therefore, the difference of the geometric mean and the arithmetic mean of 18 and 128 is -25.

If -ve root of G is taken then
                                  G = -48
and diff of G and A will be  -48 - 73 = -121

Answer:

the equation is

g=f+10 g=f-10

The volume of the solid in the first octant bounded by the parabolic cylinder z=25-x² and the plane y=1 is 32.33 cubic units (approximately).

To find the volume of the solid, we need to integrate the cross-sectional area of the solid with respect to x. Since the plane y=1 cuts the solid into two halves, we can integrate over the range 0 ≤ x ≤ 5.

For a fixed value of x, the cross-sectional area of the solid is given by the area of the ellipse formed by the intersection of the parabolic cylinder and the plane y=1. The equation of this ellipse can be obtained by substituting y=1 in the equation of the parabolic cylinder:

Therefore, the equation of the ellipse is:

We can now integrate the cross-sectional area over the range 0 ≤ x ≤ 5:

where A(x) is the area of the ellipse given by:

Evaluating the integral, we get:

Therefore, the volume of the solid in the first octant bounded by the parabolic cylinder z=25-x² and the plane y=1 is approximately 32.33 cubic units.

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