All categories

3 years ago

(3 pt)

Mathematics

1 answer:

Dima020 [189]3 years ago

6 0

We need the number that belongs just before "of" .

You might be interested in

3x + y = 6 5x - 2y = 10

Eddi Din [679]

Answer:

x=2

y = 0

Step-by-step explanation:

3x + y = 6 -------------(i)

5x - 2y = 10 -------------(ii)

Multiply (i) by 2 ===> 6x +2y = 12

(ii) ===> 5x - 2y = 10

add ============> 11x = 22

x = 22/11

x = 2

Substitute x = 2 in (i)

3*2 + y = 6

6 + y = 6

y = 6 - 6

y = 0

3 0

3 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

There are 5.32 of face paint in each paint pot she used 13 of them while painting forces how many milliliter of face paint

Goshia [24]

Answer:

69.16

Step-by-step explanation:

5 0

2 years ago

Over three days I earn 2568. On the first day I made twice as much as the second day. On the third day I made three times as muc

Fudgin [204]

Answer:

I earned $856 on the first day

Step-by-step explanation:

Let's call

x = earning on the second day

2x = earnings on the first day

3x = earnings on the third day

The total earnings are $2568, thus

x + 2x + 3x = 2568

Simplifying:

6x = 2568

Dividing by 6:

x = 2568/6

x = 428

I earned $428 on the second day.

2x = 2*$428 = $856

I earned $856 on the first day

8 0

2 years ago

A Russian mathmatician named Christian Goldbach came up with a theory that every even number can be written as the sum of two od

belka [17]

1 + 5 = 6
3 + 3 = 6

3 + 47 = 50
7 + 43 = 50
13 + 37 = 50
19 + 31 = 50

4 0

2 years ago