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3 years ago

I have a question about brainly.... how can i change my name?

Mathematics

2 answers:

ANEK [815]3 years ago

8 0

Simple go to preferences in profile settings and edit your name from there and save and your all set

Mariulka [41]3 years ago

7 0

Answer:

Follow these steps to make a change:

1. Log in to your account.

2. Go into your Profile Settings, select Edit Profile

3. Go to Your Preferences and edit the First Name section

4. Select Change to save

Step-by-step explanation:

Hope this helped!

You might be interested in

The angle of deperession of aPt A, as measured form the top of

lara [203]

Answer:B

Step-by-step explanation:

Given

Height of building $h=30\ m$

Angle of depression $\theta =45^{\circ}$

Suppose distance of Point A from base of building be $x$

From diagram we can write

$\Rightarrow \tan \theta =\dfrac{h}{x}$

$\Rightarrow \tan (45^{\circ})=\dfrac{30}{x}$

$\Rightarrow 1=\dfrac{30}{x}$

$\Rightarrow x=30\ m$

So, point A is $30\ m$ from base of building

7 0

3 years ago

Given A-<br> 2 2<br> 1 3<br> what is A-¹?

devlian [24]

The inverse of matrix A = $\left[\begin{array}{cc}2&2&1&3\\\end{array}\right]$ is $A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

The given matrix is A = $\left[\begin{array}{cc}2&2&1&3\\\end{array}\right]$

The inverse of a matrix is given by

$A^{-1} = \frac{1}{|A|} adjA$ ...(1)

Now, determinant of matrix A is

|A| = $\left|\begin{array}{cc}2&2&1&3\\\end{array}\right|$

= (3)(2) - (2)(1)

= 6 - 2

= 4

Now, adjoint A will be

$A_{11}$ = 3

$A_{12}$ = -1

$A_{21}$ = -2

$A_{22}$ = 2

AdjA = $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Now, substituting the values of |A| and AdjA in equation (1), we get

$A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Therefore, $A^{-1} = \frac{1}{4}$ $\left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|$

Know more about Inverse of Matrix: -brainly.com/question/12442362

#SPJ9

7 0

2 years ago

Consider random samples of size 50 from a population with proportion 0.15

WITCHER [35]

Answer:

a) Mean = 0.75

b) Standard error = 0.051

c) Yes

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 50

Sample proportion , p = 0.15

a) Mean

$\mu = np = 50(0.15) = 7.5$

b) Standard error

$S.E = \sqrt{\dfrac{p(1-p)}{n}} = \sqrt{\dfrac{0.15(1-0.15)}{50}} = 0.051$

c) Application of central limit theorem

Since the sample size is larger than 30, we cam apply central limit theorem for normal approximation.

6 0

4 years ago

NEED HELP ASAP PLEASE! BRAINLIEST TO RIGHT ANSWER! For two similar triangles ABC and DEF, the scale factor of ∆ABC to ∆DEF is 2

hram777 [196]

Answer:

Assuming the similarity is that BC scales to EF, answer is

D. 1.5BC

Step-by-step explanation:

Because the triangles are smilar, AB/BC = DE/EF

If AB = 2BC

then DE = 2EF

but also DE = 3BC

so 2EF = 3BC

EF = 1.5BC

5 0

3 years ago

Which function is the inverse of f(x) = 2x + 32?

kogti [31]

Answer:

(x/2)-16=f( x)

Step-by-step explanation:

f( x)=2x+32

y=2x+32

inve.rse (switc.h x an.d y)

x=2y+32

subtr.act 32 on eac.h sid.e

x-32=2y

divid.e ea.ch s.ide b.y 2

(x-32)/2=(2y)/2

(x/2)-16=y

rev.ise y a.s f( x)

(x/2)-16=f( x)

So.me wo.rd is sup.posedly ba.d an.d I do.n't kn.ow wha.t s.o I pu.t ra.ndom per.iods eve.rywhere.

7 0

4 years ago