3 years ago

Factor the following expression completely.

Mathematics

1 answer:

almond37 [142]3 years ago

7 0

Problem b is the correct answer

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Consider the algebraic expression --50 + 2a

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Answer:

-45

Step-by-step explanation:

-50 + 2a represents the sum of the constant -50 and twice the value of the variable a.

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4 years ago

Seven times the sum of a number and 1 is 28. What is the number? Enter your answer in the box.

Lilit [14]

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3 years ago

Which answer choice shows that the commutative property does not hold for matrix multiplication?

Bess [88]

Given:

The matrix statements in the options.

To find:

The answer choice that show the commutative property does not hold for matrix multiplication.

Solution:

We known that matrix multiplication is not commutative. if A and B are two non-zero matrices, then

$AB\neq BA$

Let us assume,

$A=\begin{bmatrix}-1&-8\\-3&-5\end{bmatrix}\text{ and }B=\begin{bmatrix}1&3\\8&5\end{bmatrix}$

According to the above property of the matrix, we get

$\begin{bmatrix}-1&-8\\-3&-5\end{bmatrix}\begin{bmatrix}1&3\\8&5\end{bmatrix}\neq \begin{bmatrix}1&3\\8&5\end{bmatrix}\begin{bmatrix}-1&-8\\-3&-5\end{bmatrix}$

Therefore, the correct option is B.

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3 years ago