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3 years ago

Plz help and show the work I need help with#1 and #2

Mathematics

1 answer:

AlekseyPX3 years ago

7 0

1. If two fathoms are 12 feet deep, we know that one fathom is six feet deep. multiply 6 by 10, and you'll get 60 feet deep.

2. When answering these kinds of questions, I recommend looking at an analog clock. When you count from 10:30 to 3:30, you see that Jessica babysat for five hours. $6.50 multiplied by five is $32.50.

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1+1+1+1+1+1+1+1+1+1+1+1+2+2+2+2+2+3+3+3+3+3+3+3776857867458675894678476845768478574=

jekas [21]

Answer:

3776857867458675894678476845768478614

Step-by-step explanation:

40+3776857867458675894678476845768478574=

3776857867458675894678476845768478614

8 0

2 years ago

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,

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

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

5 0

2 years ago

Read 2 more answers

What is the x-coordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?

Westkost [7]

The vertex is (-1.5, -6.75). So the x-coordinate is -1.5. Hope this helps and if so please leave a good rating and thanks. I really appreciate it. Have a nice day!

4 0

2 years ago

Read 2 more answers

Which techniques can be used to evaluate the expression 12.75 = 1.5? Select all that apply.

n200080 [17]

What is the apply??? Put all of the select all that apply so I can help you

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2 years ago

What is the average of 6 and 10?

kherson [118]

Answer:

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