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topjm [15]
3 years ago
8

Van purchased a DVD player on sale. The initial price was ​$175.90175.90. The price after the discount was ​$150.75150.75. What

was the percent of decrease​ (discount rate)? Nothing​%​ (Round to the nearest whole number as​ needed.) how to get the answers to this question?
Mathematics
1 answer:
balu736 [363]3 years ago
8 0

Answer:

14.3%

Step-by-step explanation:

175.90 - 150.75 =25.15 = 14.3%

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Name a pair of opposite rays
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AB and BC.

Also, it is EXTREMELY important that you put an arrow facing to the left above AB and an arrow facing to the right above BC.
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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}

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5 out of nine students in the sophomore class in musicians if there are 450 students in the sophomore class for many of them are
Anarel [89]

Answer:

250 Students are musicians, 200 are not.

Step-by-step explanation:

Decimal Version:

If we take "5 out of every nine students are musicians" and make this a fraction we get 5/9. 5/9 as a decimal is approximately 55.555555555556. 55.555555555556% of 450 = 250. So that means 250 students are musicians.

Fraction Version : See attached image.

3 0
3 years ago
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