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2 years ago

Geometry H.W question:

Mathematics

2 answers:

Orlov [11]2 years ago

7 0

A. Square because 90 degree angles are right angles and all of a square’s angles are equal.

andreev551 [17]2 years ago

3 0

A square is a quadrilateral that has 4 angles that is 90 degrees.

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Which ratios can form a proportion?

Nana76 [90]

Only 6/36 and 5/30 are proportional here, as they both are equal to 1/6 in their simplest form

In short, Your Answer would be Option B

Hope this helps!

7 0

3 years ago

A six-sided die is rolled eleven times. What is the probability that the die will show an even number exactly nine times?

Black_prince [1.1K]

Answer:

It is D

Step-by-step explanation:

6 x 11 = 66

3 x 9 = 27

4 0

2 years ago

Would a scale factor of -2 be considered an expansion or a contraction?

LekaFEV [45]

Scale factors of negative numbers are contractions

scale factors of numbers greater then 1 are expansions
scale factors of numbers greater then 0 but less then 1 are contractions

6 0

2 years ago

What is equivalent to 11 - ( - 3 5/8)?

fredd [130]

Step-by-step explanation:

11 - ( - 3 5/8) will equivalent to

11 + 3⅝ = 14⅝

4 0

2 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