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gayaneshka [121]
3 years ago
6

Solve this and help me plsss​

Mathematics
1 answer:
alexandr402 [8]3 years ago
8 0

Answer:

x = 2

Step-by-step explanation:

(x² logₓ27) log₉x = x + 4

Use change of base formula.

x² (log 27 / log x) (log x / log 9) = x + 4

Simplify.

x² (log 27 / log 9) = x + 4

x² (log 3³ / log 3²) = x + 4

x² (3 log 3 / (2 log 3)) = x + 4

x² (3 / 2) = x + 4

3x² = 2x + 8

3x² − 2x − 8 = 0

(x − 2) (3x + 4) = 0

x = 2 or -4/3

Since x > 0, x = 2.

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I also need help with this please
kvasek [131]
Hi!

So obviously we have to divide each side by -5. It's pretty simple! Let me show you...

-125 ≥ -135
-125/-5 ≥ -135/-5
dividing 2 negative numbers make a positive
25 ≥ 27
Now that the expression has changed, we have to flip the inequality sign.
25 ≤ 27
^the answer

Hope this helps! :)
4 0
3 years ago
Can someone check 1/10 and 9???? Thnx
fiasKO [112]
For numbers 9 and 10, we are dealing with negative exponents.

The rule of exponents states that any quantity b, taken to the power -n, equals the reciprocal of b, taken to the nth power.

Example: x⁻³ = 1 / x³

Number 9: ( 3 / y² ) ⁻³ 

Step 1: take the reciprocal:

( 3 / y² ) ⁻³ = ( y² / 3 ) ³

Step 2: distribute the exponent

( y² / 3 ) ³ = y⁶ / 27

Try to do number 10 on your own. If you have any questions, comment.


7 0
3 years ago
HELP please im doing a test and it's due in 7 minutes
Reil [10]

Answer:

2.62*10^5

can you also please mark me as brainliest?

5 0
3 years ago
Over the summer, the facility manager of a public swimming pool collected information on the amount of water in the pool and the
serious [3.7K]
C, both numbers form a mostly linear relationship.
7 0
3 years ago
hey answer these 3 questions 1/2 of 18 equals ? and my second question is 12/ times 18 equal what? and last 18 multiplied by 1/2
Jlenok [28]
Twelve times 18 is 216
4 0
4 years ago
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