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Aleksandr-060686 [28]
3 years ago
11

Can somebody explain to me how they got 3^4(x) = 3^3(x+2)? Then explain what happened to the 3 in 3^4 and the 3 in 3^3? Please a

nd thank you, I don't understand it at all.

Mathematics
1 answer:
musickatia [10]3 years ago
3 0

Answer:

x=6

Step-by-step explanation:

81^x = 27 ^(x+2)

81 = 3^4    and 27 =3^3  so replace 81 and 27 in the equation

3^4^x = 3^3^(x+2)

When we have a power to a power we can multiply the exponents

a ^b^c = a^(b*c)

3^(4x) = 3^(3*(x+2))

Since the bases are the same, the exponents  have to be the same

a^b = a^c   means b=c

4x = 3(x+2)

Now we can solve for x

Distribute

4x = 3x+6

Subtract 3x from each side

4x-3x = 3x-3x+6

x = 6

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If the point (2, 5) is a solution to the system of equations shown below, then determine the missing values of b and m. Show how
antoniya [11.8K]

Complete Question:

If the point (2, 5) is a solution to the system of equations shown below, then determine the missing values of b and m. Show how you arrive at your answer.

1. y = 3x + b

2. y = mx + 9

Answer:

1. Intercept, b = -1

2. Slope, m = -2

Step-by-step explanation:

Given the following data;

Points on the line (x, y) = (2, 5)

To find the missing values;

Mathematically, the equation of a straight line is given by the formula;

y = mx + b

Where;

  • m is the slope.
  • x and y are the points
  • b is the intercept.

1. y = 3x + b

Substituting the value of x and y, we have;

5 = 3(2) + b

5 = 6 + b

b = 5 - 6

<em>Intercept, b = -1</em>

2. y = mx + 9

Substituting the value of x and y, we have;

5 = m(2) + 9

5 = 2m + 9

2m = 5 - 9

2m = -4

m = -4/2

<em>Slope, m = -2</em>

6 0
3 years ago
PLS HELP ASAP I DONT HAVE TIME FOR THIS, IT ALSO DETECTS IF ITS RIGHT IR WRONG
Airida [17]

Answer:

A, or 50.24 ft.

Step-by-step explanation:

Doing the equation above, we know the radius of the circle, which is 8 ft.

8ft times 2 is 16ft.

16ft times pi gives us (rounded) 50.24 ft.

8 0
2 years ago
Solve this inequality for x: -46 − 8x &gt; 22. A. x &lt; 8.5 B. x &lt; -8.5 C. x &gt; -8.5 D. x &gt; 8.5
marissa [1.9K]

Step one rewrite: -46-8x>22

Add 46 to both sides: -8x>68

Divide both sides by -8 to isolate x<-8.5

(remember to flip the inequality sign when multiplying or dividing by negative numbers in inequality problems)

So the correct answer is B. x < -8.5

7 0
2 years ago
If 4 cups of water ran down the drain everyday, how many gallons would be lost over a year?
nataly862011 [7]
There are 365 days in a year, 365 multiplied by 4 cups a day... the answer is 1,460 cups went down the drain in a year.
Here, hope this helps :)
6 0
3 years ago
A television with a price of $300 is to be purchased with an initial payment of $60 and weekly
Sav [38]

Answer:

Equation which can be used to find the number of weekly  payments w

is 300  = 60 + 3 w.

Step-by-step explanation:

Here, the selling price of the TV  =$300

The initial TV payment = $60

Per week payment of TV = $30

The number of weeks, the payment is made  = w

So, the amount paid for TV in w weeks = w x ( Payment in 1 week)

= w x ( $30) = 30 w

So, The total SP of TV = Initial Payment + Payment made in w weeks

⇒ 300  = 60 + 3w

Hence, equation which can be used to find the number of weekly

payments w is 300  = 60 + 3 w.

3 0
2 years ago
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