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3 years ago

If there are 48 students in a class and 20 students have a dog, what percentage of students have a dog?

Mathematics

1 answer:

vampirchik [111]3 years ago

5 0

Yeah around 41%, what u can do to get the answer is just 20 divided by 48

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Y = 6x + 4<br> y= - 6x + 4<br> How many solutions does the system of equations have?

kvv77 [185]

Answer:

1 solution

Step-by-step explanation:

6 0

3 years ago

What is 0.16666666...as fraction .show your work

Alecsey [184]

<h3>Answer: 1/6</h3>

Work Shown:

x = 0.1666666...

10x = 1.666666...

100x = 16.666666...

100x - 10x = 16.666666... - 1.666666...

90x = 15

x = 15/90

x = (1*15)/(6*15)

x = 1/6

So, 1/6 = 0.1666666...

8 0

3 years ago

Find a number whose 6 1/4% is 12

Pachacha [2.7K]

Answer: The number is 192

Step-by-step explanation:

8 0

3 years ago

Prove that if sin (2 + y) = 3 sin (x - y), then tan x = 2 tany.

nignag [31]

Answer:

The proof is given below.

Step-by-step explanation:

Given: ( the correct question and ans is as follow )

sin (x + y) = 3sin ( x - y)

To Prove

tan x = 2 tan y

Proof:

$\sin (x+y) = 3\sin (x-y)$

Using the identities

$\sin (A+B) = \sin A.\cos B + \cos A.\sin B\\and\\\sin (A-B) = \sin A.\cos B - \cos A.\sin B\\$

we get

$\sin x.\cos y + \cos x.\sin y = 3(\sin x.\cos y - \cos x.\sin y)\\\sin x.\cos y + \cos x.\sin y = 3\sin x.\cos y - 3\cos x.\sin y$

Now we will take sin x . cos y to the left hand side and cos x . sin y to the right hand side,we get

$3\sin x.\cos y - \sin x.\cos y = 3\cos x.\sin y +\cos x.\sin y\\2\sin x.\cos y =4\cos x.\sin y\\\sin x.\cos y =2\cos x.\sin y \ \textrm{4 divide by 2}\\ \frac{\sin x}{\cos x} =2\times \frac{\sin y}{\cos y} \\\textrm{we know identity }\\\frac{\sin x}{\cos x} = \tan x\\\frac{\sin y}{\cos y} = \tan y\\\therefore \tan x = 2\tan y\ ...............{PROVED}$

7 0

3 years ago

If one pound of shrimp cost $6 what does 7/8 pound cost

Marizza181 [45]

6 / 8 = 3/4
3/4 x 7 = 5 1/4
5 1/4 = $5.25

So, 7/8 of a pound of shrimp costs $5.25.

7 0

3 years ago