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3 years ago

Find the value of x. Right triangle: Hypotenuse is 9, base is 7.

Mathematics

1 answer:

Aleks [24]3 years ago

5 0

$\sin(x) = \frac{7}{9} \: \: \: \: \: \: \: \\ \: x = \sin - 1( \frac{7}{9} ) \\ x = 51.06$

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4. PLEASE HELP ME WITH THIS MATH HOMEWORK

kenny6666 [7]

Answer:

The answer is A

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2 years ago

Robin has 10 books. Thère is enough space on a shelf for 4 books. In how many ways can 4 of the 10 books bearranged on the shelf

sveticcg [70]

If the 10 books are all different, we have:

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• 9 ways of selecting the second book,

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$10\cdot9\cdot8\cdot7=5040.$

Answer

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7 0

1 year ago

One-fourth of a number increased by thirteen is less than two.

finlep [7]

Answer: x < -44

Step-by-step explanation:

alright my fellow dude gamer, i want you to know that "a number" is basically just x

so lets do this

$\frac{1}{4}x + 13 < 2$

ok now we are going to solve for x, no?

$\frac{1}{4}x < -11$

i just subtracted 13 from both sides

now we divide -11 by 1/4

$x < -44$

MAGIC! ABSOLUTELY FANTASTIC! OH MY GOODNESS AHHHHHHH

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2 years ago

Which table represents a linear function?

Nimfa-mama [501]

Answer:

B. Is linear

Step-by-step explanation:

if you graph it it’s a straight line going up

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1 year ago

How do I prove that 2 cot 2x = cot x-tan x?

BlackZzzverrR [31]

We will start off working on the right hand side.
cot x - tan x 
= [cos x / sin x] - [sin x / cos x] 
= [(cos x)^ 2 - (sin x)^2] / [sin x cos x] 

This is where it gets a bit tougher if you do not have your formula list with you. 
(cos x)^ 2 - (sin x)^2 = cos(2x) 
sin 2x = 2 sin x cos x 

Note that by arranging the second formula, we will have sin x cos x = (1/2) sin 2x 

Hence, we will get: 
[(cos x)^ 2 - (sin x)^2] / [sin x cos x] 
= [cos 2x] / (1/2)[sin 2x] 
= 2[cos 2x] / [sin 2x] 
= 2cot 2x

7 0

3 years ago