Solve: 9^(2x + 1) = 9^(3x – 2)

Answer:

use therome 2 and 3 and try it

Answer:

answer in picture

Step-by-step explanation:

Answer:

the last one

Step-by-step explanation:

yes, because its graph is a line that passes through the origin.

For A, it's true but in a proportional relationship, the coefficient of x can be negative

B and C are obviously wrong

Use the angle sum identities to expand [tex]\sin(3A)[/tex] and [tex]\cos(3A)[/tex]:

[tex]\sin(3A)=\sin(A+2A)=\sin A\cos(2A)+\cos A\sin(2A)[/tex]

[tex]\cos(3A)=\cos(A+2A)=\cos A\cos(2A)-\sin A\sin(2A)[/tex]

Use the double angle identity to expand [tex]\sin(2A)[/tex]:

[tex]\sin(2A)=2\sin A\cos A[/tex]

So we have

[tex]\sin(3A)=\sin A\cos(2A)+2\cos^2A\sin A[/tex]

[tex]\cos(3A)=\cos A\cos(2A)-2\sin^2A\cos A[/tex]

Then divide the first expression by [tex]\sin A[/tex] and the second by [tex]\cos A[/tex]:

[tex]\dfrac{\sin(3A)}{\sin A}=\cos(2A)+2\cos^2A[/tex]

[tex]\dfrac{\cos(3A)}{\cos A}=\cos(2A)-2\sin^2A[/tex]

Squaring these gives

[tex]\dfrac{\sin^2(3A)}{\sin^2A}=(\cos(2A)+2\cos^2A)^2=\cos^2(2A)+4\cos(2A)\cos^2A+4\cos^4A[/tex]

[tex]\dfrac{\cos^2(3A)}{\cos^2A}=(\cos(2A)-2\sin^2A)^2=\cos^2(2A)-4\cos(2A)\sin^2A+4\sin^4A[/tex]

Subtract the second expression from the first to get the original equation. The [tex]\cos^2(2A)[/tex] terms cancel, leaving us with

[tex]4\cos(2A)\cos^2A+4\cos^4A+4\cos(2A)\sin^2A-4\sin^4A=2[/tex]

Now, notice that

[tex]4\cos(2A)\cos^2A+4\cos(2A)\sin^2A=4\cos(2A)(\cos^2A+\sin^2A)=4\cos(2A)[/tex]

and

[tex]4\cos^4A-4\sin^4A=4(\cos^2A-\sin^2A)(\cos^2A+\sin^2A)=4\cos(2A)[/tex]

because [tex]\cos^2A+\sin^2A=1[/tex] and [tex]\cos^2A-\sin^2A=\cos(2A)[/tex].

So we're left with

[tex]4\cos(2A)+4\cos(2A)=8\cos(2A)=2\implies\boxed{\cos(2A)=\dfrac14}[/tex]

(-7)^5 means that we are multiplying -7 to it self 5 times.

The only option that shows this is option A.

Best of Luck!

Answer:

7x7x7x7x7= 16807 A is correct.

Step-by-step explanation:7(77777) this means 7 is multiplying itself 5 times

Goodluck:)

Answer: x = -2

Step-by-step explanation:

3x+5 -13x =25     combine like terms on the left side

-10x + 5 = 25        Subtract 5 from both sides

        -5      -5

-10x = 20     Divide both sides -10

x = -2

Answer:

[tex]x = -2[/tex]

Step-by-step explanation:

If we have the equation [tex]3x+5-13x=25[/tex], we can isolate x on one side and find it's value.

Let's combine like terms.

[tex]-10x + 5 = 25[/tex]

Subtract 5 from both sides:

[tex]-10x + 5 - 5 = 25 - 5\\\\-10x = 20[/tex]

Divide both sides by -10:

[tex]-10x\div-10 = 20\div-10\\\\x = -2[/tex]

So [tex]x = -2[/tex].

Hope this helped!

Answer for the blank is: 10

The exponents are -2, 3 and 9. Note how the bases are all the same at 4x. When we multiply exponential expressions like this, we add the exponents. So we'll get -2+3+9 = 1+9 = 10 as the final exponent over the base 4x

In short,

[tex](4x)^{-2}*(4x)^3*(4x)^9 =(4x)^{-2+3+9} = (4x)^{10}[/tex]

please help meeee!!!!!! complete the equation below. (4x)^-2(4x)^3(4x)^9 =(4x)=10

Answer:

x=m+12g

Step-by-step explanation:

m=-12g+x

making x subject of formula, we have,

x=m+12g

Hello there!

Question:-

[tex]\sf \longmapsto \: m = -12g + x[/tex]

We need to find the value of x.

Solution:-

[tex]\sf \: m = -12g + x[/tex]

Firstly, Over turn the equation:-

[tex]\sf \longmapsto - 12g + x = m[/tex]

Then Add 12 g to both sides:-

[tex]\sf \longmapsto - 12g+x+12g=m+12g[/tex]

This equation may be rewritten as :-

[tex]\sf \longmapsto - 12g + 12 g + x = m + 12g[/tex]

On Simplification:-

As (-) and (+) equals to (-),

[tex]\sf \longmapsto \: 1g + x = m + 12g[/tex]

[tex]\sf \longmapsto \: x = m + 12g[/tex]

______________________________________

Henceforth,the value of x is :-

[tex] \boxed{\huge \tt \: x = 12g + m}[/tex]

_______________________________

Please let me know if you have any questions.

~MisterBrian

Answer:

8x + 1 + 6x + 5 = 90

14x +  6 = 90

14x = 84

x = 6

<DCB is 6x+5

6(6) + 5

36 + 5

41

Answer:

∠ DBC = 41°

Step-by-step explanation:

∠ DBC + ∠ DBA = 90° , substitute values

6x + 5 + 8x + 1 = 90, that is

14x + 6 = 90 ( subtract 6 from both sides )

14x = 84 ( divide both sides by 14 )

x = 6

Thus

∠ DBC = 6x + 5 = 6(6) + 5 = 36 + 5 = 41°

The quotient of 45 and r is 45r . A quotient is the result of a division. For example, 84=2 . So, 2 is the quotient.

Answer:

$60

Step-by-step explanation:

10x6=60. 6+6+6+6+6+6+6+6+6+6= 60

Answer:

5 3/8

Step-by-step explanation:

Step 1:

0.375 = 3/8

Step 2:

5 + 3/8

Answer:

5 3/8

Hope This Helps :)

Answer:

Step-by-step explanation:

Given function is

The graph  of this function is attached

Correct set of domains and ranges of the given function is:

Answer: 4y

Step-by-step explanation:

[tex]3x^{2} + 4y - 2x^{2} -1x^{2}[/tex]  To  

3x^2 - 2x^2 -1x^2 = 0  

0 +4y = 4y  

Answer:

3.6/5, 4. 9, 5. 11/2

Step-by-step explanation:

3. 2/5/6

= 2× 6/5

= 12/5

4. 7/9/7

= 7× 7/9

= 9

5. 8/11/4

= 8×4/11

= 11/2

hope you understand this answer

sorry if the answer is wrong

Answer:

10mph or 10 miles per hour

Step-by-step explanation:

From the question,

John ride 4 miles to the store and 4 miles back

Total distance travelled = 4 miles + 4 miles

= 8 miles

Total time travelled

Time to the store = 3/10 of an hour

Time back from the store = 1/2 of an hour

Total time travelled

= 3/10 + 1/2

= (3 × 2) +(10 × 1)/20

= 6 + 10/20

= 16/20

= 4/5

Total time travelled= 4/5 hour

His average rate of speed for the entire trip formula =

Speed = Total distance travelled (miles)/ Time (hour)

= 8/(4/5)hour

= 8 ÷ 4/5

= 8 × 5/4

= 40/4miles/ hour

= 10 miles/ hour

Therefore, his average rate of speed for the entire trip is 10 miles/hour

Step-by-step explanation:

1/8+1/2make both denominators 8

in 1/2 multiply both the numerator and the denominator by 4to get 4/8

1/8 + 4/8=5/8

Answer:The value of the digit in the hundredths place is 10 times as great as the value of the digit in the tenths place.

Explained: The model shows that your number is 0.11

We have to find what we can multiply to become the 1 in the tenths place. Since they are the same number but in different places, we just multiply it by 10 to change the value.

So, if you multiply 10 by the 1 in the hundredths place, it will get you to the 1 in the tenths place.

♡Hope it helps♡

Answer:

6.     (2x - 1)

      (3x + 2)

8.       y - 3    

     y² - 3y + 9

Step-by-step explanation:

6.   2x² + 9x - 5

      3x² + 17x + 10

= (2x - 1) (x + 5)

  3x² + 17x + 10

= (2x - 1)  (x + 5)

  (3x + 2) (x + 5)

= (2x - 1)

  (3x + 2)

8.  y² - 9  

    y³ + 27

= (y + 3) (y - 3)

      y³ + 27

=     (y + 3) (y - 3)    

  (y+3) (y² - 3y + 9)

=     y - 3    

  y² - 3y + 9

Answer:

see below

Step-by-step explanation:

6)

2x² + 9x - 5

------------------

 3x² + 17x + 10

(2x - 1) (x + 5)

--------------------

 3x² + 17x + 10

(2x - 1)  (x + 5)

--------------------

(3x + 2) (x + 5)

(2x - 1)

-----------

(3x + 2)

8)

y² - 9  

------------

y³ + 27

(y + 3) (y - 3)

--------------------

   y³ + 27

(y + 3) (y - 3)    

--------------------

(y+3) (y² - 3y + 9)

     y - 3    

---------------------

 y² - 3y + 9

Answer:

Y = 3/4X - 3/2

Step-by-step explanation:

3X - 4y =6

3X - 6 =4Y

Y = 3/4X - 3/2

The value of Y for the expression 3x - 4y = 6 will be Y = 3/4X - 3/2.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

The given expression is 3x - 4y = 6. The value for y will be calculated as,

3X - 4y =6

Rearrange the above equation and solve for Y,

3X - 6 =4Y

Y = 3/4X - 3/2

To know more about an expression follow

https://brainly.com/question/28725261

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Answer:

25[tex]x^{2}[/tex] - 30xy + 20xz + 9[tex]y^{2}[/tex]  - 12yz + 4[tex]z^{2}[/tex]

Step-by-step explanation:

We multiply it out.

(5x - 3y + 2z) * (5x - 3y + 2z)

5x*5x + 5x*-3y + 5x*2z - 3y*5x - 3y*-3y -3y*2z + 2z*5x +2z * -3y +2z *2z

25[tex]x^{2}[/tex] - 15xy + 10xz - 15xy + 9[tex]y^{2}[/tex] - 6yz + 10xz - 6yz + 4[tex]z^{2}[/tex]

Add like terms

25[tex]x^{2}[/tex] - 15xy - 15xy + 10xz + 10xz + 9[tex]y^{2}[/tex] - 6yz - 6yz + 4[tex]z^{2}[/tex]

25[tex]x^{2}[/tex] - 30xy + 20xz + 9[tex]y^{2}[/tex]  - 12yz + 4[tex]z^{2}[/tex]

Answer:

x = 26

Step-by-step explanation:

1 / 3 (x - 2) = 1 / 5 (x + 4) + 2

1/3x - 2/3 = 1/5x + 4/5 + 2

1/3x - 1/5x = 4/5 + 2/3 + 2

(5x - 3x)/15 = (12 + 10 + 30) / 15

2x / 15 = 52 / 15

2x = 52

x = 52 / 2

x = 26

Answer:

x=26

Step-by-step explanation:

=========================================================

Let's go through the answer choices one by one

Answer: the answer is A

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

since it ends with a zero it is divisible by ten. If you take the 0 off of 740 then it would be 74 and 74x10=740

Hope this helps.

Answer:

B) n-8=42

Step-by-step explanation:

"difference" means subtraction.

the number is represented by "n" in this problem.

"and" indicates where the symbol goes.

"is" means "=".

The equation that represents the given statement should be n-8 = 42.

Given that

Based on the above information,

We know that the difference means subtraction.

So, the following equation should be made.

n - 8 = 42

Therefore we can conclude that The equation that represents the given statement should be n-8 = 42.

Learn more about the equation here: brainly.com/question/21105092

Answer:

the first one

Step-by-step explanation: it worked for me i passed it