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2 years ago

1. Is -7+9=-9+7 true, false , or open?

Mathematics

2 answers:

jeka57 [31]2 years ago

8 0

1. Is B

2. Is C

3. Is C

4. Is A

Tju [1.3M]2 years ago

6 0

1. false

2. idk

3. its C

4. idk

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I NEED HELP!! please show all work

PtichkaEL [24]

Take the logarithm of both sides. The base of the logarithm doesn't matter.

$4^{5x} = 3^{x-2}$

$\implies \log 4^{5x} = \log 3^{x-2}$

Drop the exponents:

$\implies 5x \log 4 = (x-2) \log 3$

Expand the right side:

$\implies 5x \log 4 = x \log 3 - 2 \log 3$

Move the terms containing x to the left side and factor out x :

$\implies 5x \log 4 - x \log 3 = - 2 \log 3$

$\implies x (5 \log 4 - \log 3) = - 2 \log 3$

Solve for x by dividing boths ides by 5 log(4) - log(3) :

$\implies \boxed{x = -\dfrac{ 2 \log 3 }{ 5 \log 4 - \log 3 }}$

You can stop there, or continue simplifying the solution by using properties of logarithms:

$\implies x = -\dfrac{ \log 3^2 }{ \log 4^5 - \log 3 }$

$\implies x = -\dfrac{ \log 9 }{ \log 1024 - \log 3 }$

$\implies \boxed{x = -\dfrac{ \log 9 }{ \log \frac{1024}3 }}$

You can condense the solution further using the change-of-base identity,

$\implies \boxed{x = -\log_{\frac{1024}3}9}$

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2 years ago

PLEASE ANSWER I WILL GIVE 30 POINTS!

Bingel [31]

Answer:

So the correct answer is"none of the above".

Step-by-step explanation:

z+(z+6)=z+z+6=2z+6. \\ \\ (z+z)+(z+6)=z+z+z+6=3z+6. \\ \\ (z+6)+6=z+12 \\ \\

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3 years ago

Sam have 10 books and Mary have 10 books too how manny books they all have

andreev551 [17]

Sam and Mary have 20 books.

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2 years ago

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What is this value 4.6(-2)

Bingel [31]

Answer:

-9.2

Step-by-step explanation:

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2 years ago

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When is g(x) = 0 for the function g(x) = 5⋅2^3x + 4?

SashulF [63]

The answer should be when X=1
Hope this helped u out if not sorry
:D

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3 years ago