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Linear Algebra

09/26/22

Linear Decrease

the population of a town today is 20000 people.(a) If the population decreases linearly and the decrease is 9% in the first year, what will the town's population be in 10 years?

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Linear Algebra

09/24/22

binary operations

a⊗b=a2+b+4a⊗b=a2+b+4 Simplify each of the following. Do the order of operations (do what is in parentheses first). (7⊗5)⊗3

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Linear Algebra Electrical Engineering

09/24/22

Convolution and solving for the Toeplitz and Hankel matrices

Some linear functions associated with a convolution system. Suppose that 𝑢 and 𝑦 are scalar-valued iscrete-time signals (i.e., sequences) related via convolution:𝑦(𝑘) = ∑j ℎj𝑢(𝑘 − 𝑗), 𝑘 ∈ ℤ, where... more

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Linear Algebra Electrical Engineering

09/24/22

Show that for matrices 𝐴, 𝐵 ∈ ℝnxn, a vector 𝒘 = 𝐴𝐵𝒙 can be written as 𝒘 = ∑ni=1 (𝒃iT𝒙)𝒂i

Show that for matrices 𝐴, 𝐵 ∈ ℝnxn, a vector 𝒘 = 𝐴𝐵𝒙 can be written as 𝒘 = ∑ni=1 (𝒃iT𝒙)𝒂iwhere 𝒃𝑖T is the 𝑖th row of matrix 𝐵, and 𝒂i is the 𝑖th column of matrix 𝐴.(Hint: Let 𝒛 = 𝐵𝒙, then 𝒘 = 𝑧1𝒂1... more

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Linear Algebra Math Algebra 1

09/22/22

algebra one grade 8

fatima earned an 85 average in her science class. The average is based on 6 tests that she takes over the span of the marking period. On her first four tests she earned a 83, a 78 an 87 and an 80.... more

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Linear Algebra

09/21/22

Linear equations

What is aquation for four less than 4 times a number is eighteen?

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Linear Algebra

09/21/22

Linear equations

How many ounces of a 10% acid mixture needs to be mixed with a 30% acid mixture to get 30 ounces of a mixture that is 25% acid?

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Linear Algebra

09/20/22

pls help n give formula ~!

helen's monthly pocket money is $50. juliet's monthly pocket money is $45.helen's average daily expenditure is $x. juliet's average daily expenditure is $(2/3x).after 2 weeks, juliet has $3 more... more

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Linear Algebra

09/20/22

Solve the following system of linear equations

1. 3x − y = 0 −x + y = 4 2. x + 2y = 5 x + 5y = 9 3. 3x − y = −2 −5x + y = −10 4. x + y = 0 4x − y = −3

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Linear Algebra

09/19/22

HELP! pleasepleaseplease

natalie is 4x years old. her sister, mandy is 3 years older than her. 4 years ago, their total age was 51 years, find natalie's present age.

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Linear Algebra

09/19/22

PLEASE HELP! confused :(

to fill a water tank, mr tran needs 1 pail and 1 water barrel. the capacity of 1 pail is (3z-5)L and that of 1 water barrel is (9z-10)L. if the capacity of the water tank is 91L, what is the... more

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Linear Algebra

09/18/22

Todd had 6 gallons of gasoline in his motorbike. After driving 150 miles, he had 3 gallons left. Compute the slope, or rate of change in the amount of gasoline.

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Linear Algebra

09/12/22

The function is defined as g(x)= 5/-2x^2+6x. find g(x+4)

Write your answer without parentheses, and simplify it as much as possible

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Linear Algebra

09/09/22

Percent mixture problem using linear equation

In the lab, Lisa has two solutions that contain alcohol and is mixing them with each other. Solution A is 2% alcohol and Solution B is 6% alcohol. She uses 200milliliters of Solution A. How many... more

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Linear Algebra Math Calculus Mathematica

09/07/22

find the determinant

If a 4×4 matrix A with rows v1, v2, v3, and v4 has determinant detA=7,row 1 [ v1]row 2 [ 4v2 + 9v4 ]row 3 [ v3 ] row 4 [3v2 + 2v4 ]what is the det of this matrix?

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Linear Algebra

09/07/22

Yolandas coffee shop makes a blend that is a mixture of two types of coffee.

Yolandas coffee shop makes a blend that is a mixture of two types of coffee. Type A coffee costs $5.45 per pound, and type B coffee costs $4.40 per pound. This month, Yolanda made 169 pounds of the... more

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Linear Algebra Math Calculus Mathematica

09/06/22

matrix help finding X

Solve for X. Assume X is a 2×2 matrix and I denotes the 2×2 identity matrix. Do not use decimal numbers If there are fractions, leave them unevaluated.

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Linear Algebra Math Calculus

09/06/22

finding matrix x

Solve for X. Assume X is a 2×2 matrix. Do not use decimal numbers, If there are fractions, leave them unevaluated.

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Linear Algebra

09/04/22

If a 8 oz cup of coffee is $2.10 and a 20 oz is $3.30, how much should a cup 10 oz and 16 oz cost?

Linear interpolation

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Linear Algebra Algebra 2

09/04/22

Let Q = {(x,y) ∣ x ∈ Z, y ∈ R}. Q is closed under addition. Give a vector v ∈ Q and a scalar c for which cv ∉ Q

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Linear Algebra

09/03/22

What is the least common denominator for the rational expressions 1⁄(x^2-5x-6) and 1⁄(x^2-12x+36) ? show your work.

What is the least common denominator for the rational expressions 1⁄(x2-5x-6) and 1⁄(x2-12x+36) ? show your work.

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Linear Algebra

09/03/22

Find all the value of x that satisfy at least one of the two inequalities 2x-7≤ 1 or 2x+1>3

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Linear Algebra

09/03/22

A local hamburger shop sold a combine total of 696 hamburgers and cheeseburgers on Sunday there were 54 fewer cheeseburger sold then hamburgers how many hamburgers were sold on Sunday

A local hamburger shop solely combined total of 696 hamburgers and cheeseburgers on Sunday there were 54 fewer cheeseburgers sold than hamburgers how many hamburgers were sold on Sunday

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Linear Algebra Algebra 2

09/02/22

Find a basis for W = {(x,y,z,w): x − 2 y + w = 0, 2 x − z + w = 0}.

From what I know, to find a basis for the span of a set of vectors, write the vectors as rows of a matrix and then row reduce the matrix.However,[1,0,-1/2,1/2,0], and [0,1,-1/4,-1/4,0] isn't correct.

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Linear Algebra Algebra 2

09/02/22

Let M = {(x,y) ∈ R^2 ∣ 0 ≤ x ≤ y}, N = {(x,y) ∈ R^2 ∣ 0 ≥ x ≥ y} and P = M ∪ N. P is closed under scalar multiplication. Give two vectors in P whose sum is not in P

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Linear Decrease

binary operations

Convolution and solving for the Toeplitz and Hankel matrices

Show that for matrices 𝐴, 𝐵 ∈ ℝnxn, a vector 𝒘 = 𝐴𝐵𝒙 can be written as 𝒘 = ∑ni=1 (𝒃iT𝒙)𝒂i

algebra one grade 8

Linear equations

Linear equations

pls help n give formula ~!

Solve the following system of linear equations

HELP! pleasepleaseplease

PLEASE HELP! confused :(

Todd had 6 gallons of gasoline in his motorbike. After driving 150​ miles, he had 3 gallons left. Compute the​ slope, or rate of change in the amount of gasoline.

The function is defined as g(x)= 5/-2x^2+6x. find g(x+4)

Percent mixture problem using linear equation

find the determinant

Yolandas coffee shop makes a blend that is a mixture of two types of coffee.

matrix help finding X

finding matrix x

If a 8 oz cup of coffee is $2.10 and a 20 oz is $3.30, how much should a cup 10 oz and 16 oz cost?

Let Q = {(x,y) ∣ x ∈ Z, y ∈ R}. Q is closed under addition. Give a vector v ∈ Q and a scalar c for which cv ∉ Q

What is the least common denominator for the rational expressions 1⁄(x^2-5x-6) and 1⁄(x^2-12x+36) ? show your work.

Find all the value of x that satisfy at least one of the two inequalities 2x-7≤ 1 or 2x+1>3

A local hamburger shop sold a combine total of 696 hamburgers and cheeseburgers on Sunday there were 54 fewer cheeseburger sold then hamburgers how many hamburgers were sold on Sunday

Find a basis for W = {(x,y,z,w): x − 2 y + w = 0, 2 x − z + w = 0}.

Let M = {(x,y) ∈ R^2 ∣ 0 ≤ x ≤ y}, N = {(x,y) ∈ R^2 ∣ 0 ≥ x ≥ y} and P = M ∪ N. P is closed under scalar multiplication. Give two vectors in P whose sum is not in P

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Todd had 6 gallons of gasoline in his motorbike. After driving 150 miles, he had 3 gallons left. Compute the slope, or rate of change in the amount of gasoline.