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2 years ago

1 Which expression is equivalent to

Mathematics

1 answer:

Fiesta28 [93]2 years ago

4 0

Answer:

what's the original equation

Step-by-step explanation:

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Which is the expanded form of 124,750,000?

frez [133]

Answer: The correct answer is B.

Step-by-step explanation:

100,000,000 + 20,000,000 + 4,000,000 + 700,000 + 50,000 = 124,750,000

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3 years ago

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Determine whether the value of each power is positive or negative.

avanturin [10]

-10 negative -3 positive -2 positive 1- positive

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2 years ago

Match each expression with an equivalent expression.

jolli1 [7]

1=6x-4x

2= 6x-4

3=6-4x

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3 years ago

Over the course of a month, a person’s weight decreases. What type of relationship is this?

Hoochie [10]

It is a negative relationship

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3 years ago

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Given the matrices: 1 2 A= 1 -1 2 1 1 B= 3 4 Calculate AB: C11 C12 [2.1] х 1 2 3 4 C21 C22 C11 = C12 = -2 C22 - C215 DONE

eduard

Answer:

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

Step-by-step explanation:

Given the matrices

$A=\begin{pmatrix}1&-1\\ 2&1\end{pmatrix}$

$B=\begin{pmatrix}1&2\\ \:3&4\end{pmatrix}$

Calculating AB:

$\begin{pmatrix}1&-1\\ \:\:2&1\end{pmatrix}\times \:\begin{pmatrix}1&2\\ \:\:3&4\end{pmatrix}=\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}$

Multiply the rows of the first matrix by the columns of the second matrix

$=\begin{pmatrix}1\cdot \:1+\left(-1\right)\cdot \:3&1\cdot \:2+\left(-1\right)\cdot \:4\\ 2\cdot \:1+1\cdot \:3&2\cdot \:2+1\cdot \:4\end{pmatrix}$

$=\begin{pmatrix}-2&-2\\ 5&8\end{pmatrix}$

Hence,

$\begin{pmatrix}c_{11}&c_{12}\\ \:\:\:c_{21}&c_{22}\end{pmatrix}=\begin{pmatrix}-2&-2\\ \:5&8\end{pmatrix}$

Therefore,

$\:c_{11}=-2,\:\:\:c_{12}=-2$

$\:c_{21}=5,\:\:\:c_{22}=8$

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3 years ago

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1 Which expression is equivalent to ​

1 Which expression is equivalent to