All categories

3 years ago

Help!!! il give brainlist

Mathematics

1 answer:

OLga [1]3 years ago

7 0

Answer:

A= linear, B= linear

Step-by-step explanation:

because im learning this rn too

You might be interested in

How to make a circeldiagramm

lys-0071 [83]

Make a circle and then another circle. There should be a oval in the middle.
Like this:
https://docs.google.com/drawings/d/10jIdkQW5rnxfDS9T2WeqkwRTvl92oJsYkXVLj8Zn6hU/edit

4 0

3 years ago

at the zoo, the yellow birds are fed 1/3 of a bag of seed each day. the blue birds get fed 1/4 as much as the yellow birds. how

agasfer [191]

1/12 is the answeris it ok

5 0

4 years ago

This is the countiue question to the last one I posted. so please help

Vedmedyk [2.9K]

Answer:

4.5 i think

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Write -3+4i in the form r(cosx+isinx)

Zanzabum

$-3+4i$ is a complex number that satisfies

$\begin{cases}r\cos x=-3\\[1ex]r\sin x=4\\[1ex]r=\sqrt{(-3)^2+4^2}\end{cases}$

The last equation immediately tells you that $r=5$ .

So you have

$\begin{cases}\cos x=-\dfrac35\\[1ex]\sin x=\dfrac45\end{cases}$

Dividing the second equation by the first, you end up with

$\dfrac{\sin x}{\cos x}=\tan x=\dfrac{\dfrac45}{-\dfrac35}=-\dfrac43$

Because the argument's cosine is negative and its sine is positive, you know that $\dfrac\pi2$ . This is important to know because it's only the case that $y=\tan x\implies \arctan y=x$ whenever $-\dfrac\pi2$ . The inverse doesn't exist otherwise.

However, you can restrict the domain of the tangent function so that an inverse can be defined. By shifting the argument of tangent by $\pi$ , we have

$\tan(x-\pi)=y\implies x=\pi+\arctan y$

All this to say

$\tan x=-\dfrac43\implies x=\pi+\arctan\left(-\dfrac43\right)\approx2.2143\text{ rad}\approx126.9^\circ$

So, $-3+4i=5(\cos126.9^\circ+i\sin126.9^\circ)$ .

5 0

3 years ago

1. Describe the relationship between the following lines:

Anestetic [448]

I believe your answer is B

4 0

4 years ago

Help!!! il give brainlist​

Help!!! il give brainlist