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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 Algebra

09/01/22

3) Prove the following statement: “If x is an even integer, then x^2 is also even."

Not sure if I solved it correctly, but feel free to solve it another way or correct me. Here is what I did:x^2=(2n+2)^2 -- I let nE(belongs to)R(all real number) such that x^2 is an even... more

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Linear Algebra

09/01/22

2) Use DeMorgan’s Laws to write the negation of the statement: “R≤min {m,n}". (hint: rewrite the statement as an “and” statement.)

Been trying to figure out this problem, but I am completely clueless as to what to do. I know your suppose to use the quantifier and maybe an axiom.

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Linear Algebra

09/01/22

1a) Write the negation of “if x2>4 then x>2” (your statement should be an “and” or “there exists” statement). 1b) Give all the xvalues that are described by your negation statement.

I know your suppose to use universal or existential quantifier with the reverse A(for all) or E(there exist) element. However, I tried solving it a different way and would this be a possible... more

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Linear Algebra

08/31/22

Trent can deliver his newspapers in 30 minutes. It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work together?

I got a variation of this this wrong 4 times, need some help.

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Linear Algebra

08/31/22

A bank loaned out $14,000, part of it at the rate of 6% per year and the rest at 14% per year. If the interest received in one year totaled $1500, how much was loaned at 6%?

Couldn't figure this one out on my own, keep getting it wrong and don't know where I'm messing it up.

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Linear Algebra

08/31/22

If 13 is added to a number and the sum is doubled, the result is -5 less than the number. Find the number.

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Linear Algebra Math Calculus Mathematica

08/30/22

matrix arithmetic help

Determine the value(s) of x such that [3 -6 -3] [x][ x 2 1] -6 -2 3 -1 -3 -2 0 ... more

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Linear Algebra

08/30/22

Can some one please help me with my Algebra?

Consider the line that passes through the point P(-4,1) and has slope −1-1. Write the slope-intercept form of the equation of the line. Use exact values

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Linear Algebra Algebra 1 Algebra 2

08/29/22

Word problem for algebra

Mikayla is training for a half-marathon. At the beginning of her training, she is able to run 2 miles without stopping. Her goal is to increase her distance by three quarters of a mile each week.

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Linear Algebra

08/29/22

Given A is a known 3x3 matrix, and given x is a solution of A|b (also known), then how do I find the vector b?

The matrix A is:1,5,60,1,13,8,1And x is:131

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Linear Algebra

08/28/22

Linear equation

A hotel manager found that his gross receipts for the day, including a 5% sales tax, were $4186.35. Find the amount of sales tax collected.

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Linear Algebra

08/28/22

Linear algebra find the equation

Parallel to y=2x+5 and passes the line (4,3)

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Linear Algebra

08/27/22

need help please

Write an equation for a line perpendicular to y = − 2 x − 4 and passing through the point (-4,-7)

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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

3) Prove the following statement: “If x is an even integer, then x^2 is also even."

2) Use DeMorgan’s Laws to write the negation of the statement: “R≤min {m,n}". (hint: rewrite the statement as an “and” statement.)

1a) Write the negation of “if x2>4 then x>2” (your statement should be an “and” or “there exists” statement). 1b) Give all the xvalues that are described by your negation statement.

Trent can deliver his newspapers in 30 minutes. It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work​ together?

A bank loaned out ​$14,000​, part of it at the rate of 6% per year and the rest at 14% per year. If the interest received in one year totaled $​1500​, how much was loaned at 6%?

If 13 is added to a number and the sum is doubled, the result is -5 less than the number. Find the number.

matrix arithmetic help

Can some one please help me with my Algebra?

Word problem for algebra

Given A is a known 3x3 matrix, and given x is a solution of A|b (also known), then how do I find the vector b?

Linear equation

Linear algebra find the equation

need help please

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Trent can deliver his newspapers in 30 minutes. It takes Lois 20 minutes to do the same route. How long would it take them to deliver the newspapers if they work together?

A bank loaned out $14,000, part of it at the rate of 6% per year and the rest at 14% per year. If the interest received in one year totaled $1500, how much was loaned at 6%?