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lozanna [386]
3 years ago
13

What is 3 1/4 as a decimal & as a percent?​

Mathematics
2 answers:
IrinaVladis [17]3 years ago
5 0
¼ = 0.25
3¼ = 3.25 = 325%
SSSSS [86.1K]3 years ago
3 0
Decimal number =3.25
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2 ln(x + 2) − ln(−x) = 0
enyata [817]

Answer:

x=-1

Step-by-step explanation:

Rewrite the equation using the next propierties:

log(\frac{1}{x} )=-log(x)

ylog(x)=log(x^{y} )

log(x*y)=log(x)+log(y)

ln((x+2)^2)+ln(\frac{-1}{x} )=0\\ln(\frac{(x+2)^2}{-x})=0

Cancel logarithms by taking exp of both sides:

\frac{(x+2)^2}{-x} =e^{0} =1

Multiplying both sides by -x and factoring:

x^{2} +5x+4=0

Factoring:

(x+1)(x+4)=0

The solutions are:

x=-1\hspace{3}or\hspace{3}x=-3

Evaluating x=-4

2ln(-2)-(4)=0

This is an absurd because ln(x) is undefined for x\leq 0

Evaluating x=-1

2ln(1)-ln(1)=0\\0-0=0

Which is correct, hence the solution is:

x=-1

6 0
4 years ago
Simplify and put in a Sipmplified expression:<br> 16x2-5+ 6x - 7x2
irga5000 [103]

Answer:

  9x^2 +6x -5

Step-by-step explanation:

The x^2 terms are like terms and can be combined.

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  = (16 -7)x^2 +6x -5

  = 9x^2 +6x -5

_____

<em>Additional comment</em>

The expression is in standard form when the terms are in decreasing order by their degree.

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What is the missing reason in step 5
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