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Algebra

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A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Multiplication chart! :)

12 cards

2x1

2x2

2x3

2x4

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Math and Arithmetic

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The length of a rectangular floor is 2 feet more than its width The area of the floor is 168 square feet Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visib

The perimeter of a rectangle is 18 feet and the area of the rectangle is 20 square feet what is the width of the rectangle

The sum of two numbers is 19 and their product is 78 What is the larger number

A rectangular garden has a perimeter of 48 cm and an area of 140 sq cm What is the width of this garden

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Q: How do you prove if the determinant of A is not equal to zero then the matrix A is invertible?
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If matrix a is invertible and a b is invertible and a 2b a 3b and a 4b are all invertible how can you prove that a 5b is also invertible?

What is "a 3b"? Is it a3b? or a+3b? 3ab? I think "a3b" is the following: A is an invertible matrix as is B, we also have that the matrices AB, A2B, A3B and A4B are all invertible, prove A5B is invertible. The problem is the sum of invertible matrices may not be invertible. Consider using the characteristic poly?


Prove that the inverse of an invertible mapping is invertible?

Assume that f:S->T is invertible with inverse g:T->S, then by definition of invertible mappings f*g=i(S) and g*f=i(T), which defines f as the inverse of g. So g is invertible.


Prove that trace of the matrix is invariant under similarity transformation?

The trace of an nxn matrix is usually thought of as the sum of the diagonal entries in the matrix. However, it is also the sum of the eigenvalues. This may help to understand why the proof works. So to answer your question, let's say A and B are matrices and A is similar to B. You want to prove that Trace A=Trace B If A is similar to B, there exists an invertible matrix P such that A=(P^-1 B P) Now we use the fact that Trace (AB)= Trace(BA) for any nxn matrices A and B.This is easy to prove directly from the definition of trace. (ask me if you need to know) So using this we have the following: Trace(A)=Trace(P^-1 B P)=Trace (BPP^-1)=Trace(B) and we are done! Dr. Chuck


Matrix prove if Ax equals Bx then A equals B?

If x is a null matrix then Ax = Bx for any matrices A and B including when A not equal to B. So the proposition in the question is false and therefore cannot be proven.


How can you write a program which proves that a multiple of a matrix and its determinant is an identity matrix?

Automated proofs are a complicated subject. If you are not an expert on the subject, all you can hope for is to write a program where you can input a sample matrix (or that randomly generates one), and verifies the proposition for this particular case. If the proposition is confirmed in several cases, this makes the proposition plausible, but is by no means a formal proof.Better try to prove it without writing any program.Note: it is not even true; it is the inverse of the matrix which gives identity when is multiplied with the original matrix.


How to prove that the spectral radius of a symmetric square matrix on real numbers is not larger than the 1-norm of the matrix?

Let's prove that rho(A)=2-norm(A) for A symmetrical and then prove the relation between 1-norm and 2-norm. Both are easy.


How do you prove ab equals ba?

You cannot prove it since it is axiomatic. You can get consistent theories (matrix algebra, for example) where ab is not ba.


Prove that a matrix which is both symmetric as well as skew symmetric is a null matrix?

Let A be a matrix which is both symmetric and skew symmetric. so AT=A and AT= -A so A =- A that implies 2A =zero matrix that implies A is a zero matrix


How do you prove that a trapezoid is isosceles?

You prove that the two sides (not the bases) are equal in length. Or that the base angles are equal measure.


How do you prove that triangles are equal?

The answer depends on what you mean by equal. Equal in area? Congruent?


Prove that a matrix a is singular if and only if it has a zero eigenvalue?

Recall that if a matrix is singular, it's determinant is zero. Let our nxn matrix be called A and let k stand for the eigenvalue. To find eigenvalues we solve the equation det(A-kI)=0for k, where I is the nxn identity matrix. (<==) Assume that k=0 is an eigenvalue. Notice that if we plug zero into this equation for k, we just get det(A)=0. This means the matrix is singluar. (==>) Assume that det(A)=0. Then as stated above we need to find solutions of the equation det(A-kI)=0. Notice that k=0 is a solution since det(A-(0)I) = det(A) which we already know is zero. Thus zero is an eigenvalue.


How do you prove that 0.999999999999 is equal to one?

You cannot prove that because it's false


Prove that the diagonals of rectangle are equal?

prove any two adjacent triangles as congruent


How can you prove tha2 equals 1?

It isn't equal, and any proof that they are equal is flawed.


How do you prove a trapezoid is isoceles?

Base angles are equal


What does a rhombus have to have to prove that it is a rhombus?

a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.


What measure of angle a will make triangle abc similar to triangle fde?

Corresponding angles must be equal; in this case, that would be angle f. To prove that the two triangles are equal, you would have to prove that at least another pair of angles is also equal, for example, angle b equal to angle d. Or prove some other facts, like the ratio between certain corresponding sides.


How do prove 7 is equal to 12?

It is not true so you cannot prove it. You can concoct a "proof" that might look OK but it will be flawed.


How do you prove cash accounting?

to prove cash you look at the amount of money you have and accounting books. if the value is equal then you have proved cash


How do you prove cash in accounting?

to prove cash you look at the amount of money you have and accounting books. if the value is equal then you have proved cash


Love equal what?

No, but there is a way to prove that zero equals one.


How do you prove 1 kg equal to 1000 grams?

It is a fact - by definition. You cannot prove it. You can verify it by comparing the two masses.


How do you prove 1 plus 1 equal to 1?

use you brain


How do you prove 3 equal to 1?

It doesn't...I thought that was clear enough...


Prove that two squares are similar?

Say that the angles all equal 90 degrees and that all sides are equal in length.