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3 years ago

Translate the following phrase into an algebraic expression. Use the

Mathematics

1 answer:

marissa [1.9K]3 years ago

8 0

Answer:

8+n/3

Step-by-step explanation:

$\frac{8+n}{3}$

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Nataliya [291]

The answer is A. You can solve this by plugging the X values from the table into the equation and seeing if you end up with the right Y value.

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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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2 years ago

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Help me ?!?! Pleaseee

Mars2501 [29]

Answer:

Step-by-step explanation:

Hope this helps! :)

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3 years ago

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Complete the equation for the standard form of the line that has an x-intercept of -5 and a y-intercept of -4.

Verdich [7]

Answer:

Intercept form $\frac{x}{-5} + \frac{y}{-4} = 1$

The standard form of the equation of the line

4 x + 5 y +20 =0

Step-by-step explanation:

Explanation

Given that x-intercept (a) = -5

and y-intercept (b) = -4

Intercept form

$\frac{x}{a} + \frac{y}{b} = 1$

$\frac{x}{-5} + \frac{y}{-4} = 1$

⇒ $\frac{4x+5y}{-20} = 1$

4 x + 5 y = -20

Final answer:-

The standard form of the equation of the line

4 x + 5 y +20 =0

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2 years ago

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Anit [1.1K]

71,47899999899999999999999

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2 years ago

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