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Gekata [30.6K]
3 years ago
9

help? I know what i’m doing somewhat but i really just didn’t wanna pay attention in class the day this was taught

Mathematics
2 answers:
PIT_PIT [208]3 years ago
7 0

To solve the equation for x, first divide both sides of the equation by 4 to get e^{2.7x}=\frac{33}{4}. Then, take the natural logarithm of both sides (base e) to get \ln e^{2.7x} = \ln (33/4). The left hand side of this equation if equal to 2.7x, so we get 2.7x = \ln(33/4). The final step is to divide both sides of the equation by 2.7, to get that x =\frac{ \ln (33/4)}{2.7}. This is approximately equal to 0.782.

Komok [63]3 years ago
4 0

Answer:

ily

Step-by-step explanation:

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Can you tell me how to calculate R for below Matrix ?
scoray [572]

Answer:

The rank of the matrix is 3.

Step-by-step explanation:

Consider the prided information.

x=\begin{bmatrix}x_1\\ x_2\\ x_3\end{bmatrix}=\begin{bmatrix}9&2&6&5&8\\ 12&8&6&4&10\\ 3&4&0&2&1\end{bmatrix}

Reduce the matrix in row echelon form as shown:

R_1\:\leftrightarrow \:R_2\begin{bmatrix}12&8&6&4&10\\ 9&2&6&5&8\\ 3&4&0&2&1\end{bmatrix}\\

R_2\:\leftarrow \:R_2-\frac{3}{4}\cdot \:R_1\ and\ R_3\:\leftarrow \:R_3-\frac{1}{4}\cdot \:R_1\\\\\begin{bmatrix}12&8&6&4&10\\ 0&-4&\frac{3}{2}&2&\frac{1}{2}\\ 0&2&-\frac{3}{2}&1&-\frac{3}{2}\end{bmatrix}

R_3\:\leftarrow \:R_3+\frac{1}{2}\cdot \:R_2\\\begin{bmatrix}12&8&6&4&10\\ 0&-4&\frac{3}{2}&2&\frac{1}{2}\\ 0&0&-\frac{3}{4}&2&-\frac{5}{4}\end{bmatrix}

R_2\:\leftarrow \:R_2-\frac{3}{2}\cdot \:R_3\ and\ R_1\:\leftarrow \:R_1-6\cdot \:R_3\\\begin{bmatrix}12&8&0&20&0\\ 0&-4&0&6&-2\\ 0&0&1&-\frac{8}{3}&\frac{5}{3}\end{bmatrix}\\R_2\:\leftarrow \:-\frac{1}{4}\cdot \:R_2\ , \ R_1\:\leftarrow \:R_1-8\cdot \:R_2\ and\ \:R_1\:\leftarrow \frac{1}{12}\cdot \:R_1\\\begin{bmatrix}1&0&0&\frac{8}{3}&-\frac{1}{3}\\ 0&1&0&-\frac{3}{2}&\frac{1}{2}\\ 0&0&1&-\frac{8}{3}&\frac{5}{3}\end{bmatrix}

The rank of a matrix is the number of non zeros rows.

Thus, the rank of the matrix is 3.

6 0
3 years ago
On a coordinate plane, the points are (3, 1), (6, 2), (8, 3), (12, 4).
ArbitrLikvidat [17]

Answer:

it would be 8 to 3

which is not equivalent

Step-by-step explanation:

the reason why is because of this

3, 6, 9, 12.

not:

3, 6, <em>8, </em>12.

5 0
3 years ago
Read 2 more answers
Last week, Emma painted her fence. She used 6 cans of paint. There were 4 liters of paint in each can.
Aleksandr [31]

Answer:

I'm guessing you want how many liters of paint she used?

she used 24 liters of paint to paint her fence.

Step-by-step explanation:

theres 6 cans

4 liters in each can

6×4=24

6 0
2 years ago
A groundskeeper needs grass seed to cover a circular field 290 feet​
aleksandrvk [35]

Answer:

what else was in this question?

Step-by-step explanation:

need the whole picture to solve

8 0
3 years ago
For the equation: – 36 – 4r = -2(-6 + 6r), what is the value of r?
horrorfan [7]

Answer:

r = 6

Step-by-step explanation:

– 36 – 4r = -2(-6 + 6r)

+36               +36

----------------------------------

-4r = -12r + 48

+12r     +12r

----------------------------------

8r = 48

/8     /8

----------------------------------

r = 6

8 0
3 years ago
Read 2 more answers
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