All categories

4 years ago

Find x if 8.4% of x is 420. explain with steps

Mathematics

1 answer:

lara [203]4 years ago

8 0

Answer:

$x=5000$

Step-by-step explanation:

$\frac{84}{1000} x=420$

$x=420 \times \frac{1000}{84}$

$x=5000$

You might be interested in

Find the integration of (1-cos2x)/(1+cos2x)

slega [8]

Given:

The expression is:

$\dfrac{1-\cos 2x}{1+\cos 2x}$

To find:

The integration of the given expression.

Solution:

We need to find the integration of $\dfrac{1-\cos 2x}{1+\cos 2x}$ .

Let us consider,

$I=\int \dfrac{1-\cos 2x}{1+\cos 2x}dx$

$I=\int \dfrac{2\sin^2x}{2\cos^2x}dx$ $[\because 1+\cos 2x=2\cos^2x,1-\cos 2x=2\sin^2x]$

$I=\int \dfrac{\sin^2x}{\cos^2x}dx$

$I=\int \tan^2xdx$ $\left[\because \tan \theta =\dfrac{\sin \theta}{\cos \theta}\right]$

It can be written as:

$I=\int (\sec^2x-1)dx$ $[\because 1+\tan^2 \theta =\sec^2 \theta]$

$I=\int \sec^2xdx-\int 1dx$

$I=\tan x-x+C$

Therefore, the integration of $\dfrac{1-\cos 2x}{1+\cos 2x}$ is $I=\tan x-x+C$ .

8 0

3 years ago

1 and 2 are complementary angles. 1 and 3 are vertical angles. If

Marizza181 [45]

If angle 1 and angle 2 are <u>complementary, </u>then they add up to 90 degrees. We are given that angle 2 equals 52 degrees.

So we subtract and get our answer:

That's NOT the final answer.

The next step is:

Angle 1 and angle 3 are vertical angles.

Vertical angles are congruent.

So if angle 1 is 38, then angle 3 is also 38.

Now, supplementary angles add up to 180 degrees.

So that's the answer:

180-38=142

142 is the supplement of angle 3.

Hope it helps! :)

Answered by

$***ROSALIND***$

8 0

3 years ago

Given that QRSTU=QXWVU, find

Mrac [35]

Angle UQR = Angle UQX since they are corresponding angles. Note how the top polygon reflects over the line QU to get the bottom polygon.

So because of this, and because angle UQX = 45, this means the answer is 45 degrees

7 0

4 years ago

Read 2 more answers

The proper natation for a normal distribution with a mean of 250 and a standard deviation of 25 is?

Zolol [24]

N(250,25)
That's all it is

5 0

3 years ago

A store had 300 empty shelves. Each shelf could hold 20 cans. What is the total number of cans the shelves could hold?

Debora [2.8K]

Answer:

it can hold 6000 cans

Step-by-step explanation:

brainliest plz

3 0

3 years ago

Read 2 more answers