All categories

3 years ago

I need help in middle school work !

Mathematics

2 answers:

Ksju [112]3 years ago

4 0

What’s your work ...

denpristay [2]3 years ago

3 0

Answer:

message me ill anwser them

Step-by-step explanation:

You might be interested in

Scientist never say a theory is proven or not they only say if the evidence _____or _____ it

nata0808 [166]

The answer to this question would be: modify or reject.

Making a fully right theory is really hard. When a new evidence shows a result that indicates the theory wrong, it might be rejected if they are fully wrong or modified if it was only partially wrong. It will need multiple of evidence to reject or modify a theory.

8 0

3 years ago

Find the reduced echelon form of [1, 2, 4; 0, 3, 6; 0, 2, 4]

taurus [48]

Answer:

$\begin{pmatrix}1&0&0\\0&3&6\\0&0&0 \end{pmatrix}$

Step-by-step explanation:

Given:

$\begin{pmatrix}1&2&4\\0&3&6\\0&2&4 \end{pmatrix}$

We need to reduce the given matrix to reduced echelon form.

Solution:

Make zeroes in column 1 except the entry at row 1, column 1. As we can see all elements in column are already zero. Make zeroes in column 2 except the entry at row 2, column 2.

$\begin{pmatrix}1&2&4\\0&3&6\\0&2&4 \end{pmatrix}\\R_3\rightarrow R_3-\frac{2}{3}R_2\\\begin{pmatrix}1&2&4\\0&3&6\\0&0&0 \end{pmatrix}\\R_2\rightarrow \frac{R_2}{3}\\\begin{pmatrix}1&2&4\\0&1&2\\0&0&0 \end{pmatrix}\\R_1\rightarrow R_1-2R_2\\\begin{pmatrix}1&0&0\\0&3&6\\0&0&0 \end{pmatrix}\\$

So, $\begin{pmatrix}1&2&4\\0&3&6\\0&2&4 \end{pmatrix}$ in reduce echelon form is $\begin{pmatrix}1&0&0\\0&3&6\\0&0&0 \end{pmatrix}$

8 0

3 years ago

Just Seabra 5.2 pounds of grapes for $7.75 using the unit rate how much would 3 pounds of grapes cost

lora16 [44]

Answer: 4.47

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Work out the area of ABCD.

lapo4ka [179]

Answer:

efghijklmnopqrstuvwxyz, thank me later

7 0

3 years ago

halfway through the fourth year , harrys collection contains 400 pennies. study the graph provided at the beginning of this acti

elixir [45]

Answer:

The coordinates of the point is (3,5 , 400)

Step-by-step explanation:

The question is incomplete as the graph is not given in the question. Lets complete the question first. I have attached the graph related to this question below.

We can see in the graph that x-axis represents the years while the y-axis represents the pennies collected by Harry.

We have to find the coordinates of the point where he is able to collect 400 pennies.

As y-axis represents pennies, and the point to be found is at 400 pennies, so the y-coordinates of the point is 400.

Harry collects 400 pennies when he is halfway through 4rth year, which means that he has been collecting for:

3 years + Half of 4rth year = 3.5 years.

As x-axis represents the year and the point to be found is at 3.5 years, so the x-coordinate of the point is 3.5.

So, the coordinates of the point is (3,5 , 400)

This point can be seen in the second graph

8 0

3 years ago