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AnnZ [28]
3 years ago
7

6 ( x - 4 ) + 3 ( x + 7 ) = 3

Mathematics
1 answer:
OlgaM077 [116]3 years ago
8 0
6x-24+3x+21=3
9x-3=3
9x=3+3
9x=6
x=6/9
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Will give brain thingy if you get this right.
PolarNik [594]
1 less than or greater than -2
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3 years ago
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Prove the identity.<br> secx- cos x = sin x tan x
Mandarinka [93]

Answer:

LHS = RHS

Step-by-step explanation:

\sec(x)  -  \cos(x)  \\  =  \frac{1}{ \cos(x) }  -  \cos(x)  \\  =  \frac{1 -  { \cos(x) }^{2} }{ \cos(x) }

Since

{ \sin(x) }^{2}  +  { \cos(x) }^{2}  = 1 \\ 1 -  { \cos(x) }^{2}  =  { \sin(x) }^{2}

Therefore,

\frac{1 -  \ { \cos(x) }^{2} }{ \cos(x) }   \\ =  \frac{  { \sin(x) }^{2} }{ \cos(x) }  \\  =   \frac{ \sin(x )  \times  \sin(x) }{ \cos(x) }  \\  =  \sin(x)  \tan(x)

Therefore LHS = RHS

8 0
4 years ago
Lines l and m are parallel. If m1 = 126, how many degrees is m2?
VashaNatasha [74]

The answer is:   " 54 °  " .

____________________________

→  The  m∠2  {"measure of angle 2"}  in the figure shown is:  " 54 ° " .

____________________________

Explanation:

____________________________

 In the figure shown in the "image attached" :

      ∠1  and ∠2  are "consecutive exterior angles" ;

and:  "consecutive exterior angles" are "supplementary" ;  

       → which means that their measurements add up to " 180° " .

____________________________

So:  Given:  " m∠1  = 126 " ;

      We are asked to find:  " m∠2 " .

                          →  {the measure of "angle 2" }.

____________________________

To solve:

____________________________

→   " m∠2"  =  180 − ( m∠1 ) ;

                   =  180 − ( 126 ) ;

                   =  54 .

____________________________

The answer is:  " 54 ° " .

____________________________

The  m∠2  {"measure of angle 2"}  in the figure shown is:  " 54 ° " .

____________________________

4 0
4 years ago
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Which of the following describes a situation for finding volume?
babunello [35]
I think it’s either b or c
6 0
3 years ago
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Rick is going to buy donuts for his family. Each donut costs $1.25. If the number of donuts Rick buys is represented using the l
Strike441 [17]

The algebraic expression that represents the total cost would be: A. 1.25r.

<h3>How to Write an Algebraic Expression?</h3>

Given that the number of donuts Rick buys for his family is represented by letter "r", and we also know that:

cost of each donut = $1.25.

Using an algebraic expression, we can create a mathematical expression that shows the total cost for Rick to by a given number of donuts for his family.

Thus:

1 donut = 1.25

r donuts would cost: 1.25 × r = 1.25r.

Therefore, the algebraic expression that represents the total cost would be: A. 1.25r.

Learn more about algebraic expression on:

brainly.com/question/2164351

#SPJ1

3 0
2 years ago
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