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Zinaida [17]
3 years ago
15

Anwer pls pls pls the correct​

Mathematics
2 answers:
navik [9.2K]3 years ago
7 0

Answer:

2.5, - 1200

Step-by-step explanation:

(a)

Substitute the given values into the expression

\frac{2a}{c} = \frac{2(-5)}{-4} = \frac{-10}{-4} = \frac{10}{4} = \frac{5}{2} = 2.5

(b)

2a × b × 5c

= 10abc

= 10 × - 5 × - 6 × - 4

= - 50 × 24

= - 1200

fomenos3 years ago
5 0

Answer:

a)2.5 b)-1200

Step-by-step explanation:

a)2(-5)/4=-10/-4=5/2=2.5

b)2(-5)×(-6)×5(-4)=-10×-6×-20=-1200

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Please someone help me...​
laiz [17]

Step-by-step explanation:

First factor out the negative sign from the expression and reorder the terms

That's

\frac{1}{ - (( \tan(2A) -  \tan(6A)  )}  -  \frac{1}{ \cot(6A)  -  \cot(2A) }

<u>Using trigonometric </u><u>identities</u>

That's

<h3>\cot(x)  =  \frac{1}{ \tan(x) }</h3>

<u>Rewrite the expression</u>

That's

\frac{1}{ - (( \tan(2A) -  \tan(6A)  )} -    \frac{1}{ \frac{1}{ \tan(6A) } }  -  \frac{1}{ \frac{1}{ \tan(2A) } }

We have

<h3>-  \frac{1}{  \tan(2A) -  \tan(6A)  } -   \frac{1}{ \frac{ \tan(2A) -  \tan(6A)  }{ \tan(6A) \tan(2A)  } }</h3>

<u>Rewrite the second fraction</u>

That's

<h3>-  \frac{1}{  \tan(2A) -  \tan(6A)  } -   \frac{ \tan(6A)  \tan(2A) }{ \tan(2A) -  \tan(6A)  }</h3>

Since they have the same denominator we can write the fraction as

-  \frac{1 +  \tan(6A) \tan(2A)  }{ \tan(2A) -  \tan(6A)  }

Using the identity

<h3>\frac{x}{y}  =  \frac{1}{ \frac{y}{x} }</h3>

<u>Rewrite the expression</u>

We have

<h3>-  \frac{1}{ \frac{ \tan(2A)  -  \tan(6A) }{1 +  \tan(6A) \tan(2A)  } }</h3>

<u>Using the trigonometric identity</u>

<h3>\frac{ \tan(x) -  \tan(y)  }{1 +  \tan(x)  \tan(y) }  =  \tan(x - y)</h3>

<u>Rewrite the expression</u>

That's

<h3>- \frac{1}{ \tan(2A -6A) }</h3>

Which is

<h3>-  \frac{1}{ \tan( - 4A) }</h3>

<u>Using the trigonometric identity</u>

<h3>\frac{1}{ \tan(x) }  =  \cot(x)</h3>

Rewrite the expression

That's

<h3>-  \cot( - 4A)</h3>

<u>Simplify the expression using symmetry of trigonometric functions</u>

That's

<h3>- ( -  \cot(4A) )</h3>

<u>Remove the parenthesis </u>

We have the final answer as

<h2>\cot(4A)</h2>

As proven

Hope this helps you

6 0
3 years ago
Read 2 more answers
The circumference of Anyeline's circle is 12 feet. What is the radius (in feet) of her circle? Round your answer to the nearest
Elina [12.6K]

Answer:

1.9

Step-by-step explanation:

you divide 12 by 2 then divided that by pi

6 0
3 years ago
Please help!! I have no idea how to this
Blababa [14]
D.) 

-75x +57 = -75x + 57
3 0
3 years ago
Read 2 more answers
(rs^-3) (4r^-2s^3) please show you're work
VARVARA [1.3K]

The simplified expression is (rs^{-3) (4r^{2 x s³) is 4r³.

<h3>What are exponents?</h3>

The amount of times a number has been multiplied by itself is shown by its exponent. The result of multiplying 8 by itself n times is represented as follows:

8 x 8 x 8 x 8 x …..n times = 8n

Given:

(rs^{-3) (4r^{2 x s³)

Now, using the law of exponents we have

a^m . a^n = a^{m+n

So,

(rs^{-3) (4r^{2 x s³)

= 4r^{2+1 x s^{-3+3

= 4r³ x s°

= 4r³

Hence, the simplified expression is (rs^{-3) (4r^{2 x s³) is 4r³.

Learn more about exponents here:

brainly.com/question/15722035

#SPJ1

8 0
1 year ago
How do you eat a proper Oreo?
Sauron [17]

Answer:

to eat a proper Oreo you eat it like a sandwich.

Step-by-step explanation:


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3 years ago
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