4 years ago

PLease help!!!!!!!!!!11

Mathematics

2 answers:

mafiozo [28]4 years ago

7 0

X=-7 I am 100 percent sure this is right

solniwko [45]4 years ago

7 0

3/5x + 5 = 4/5

Multiply throughout by 5

3x + 25 = 4

3x = 4 - 25

3x = -21

Divide by 3 throughout to find x

x = -7

Hope this helps!

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The intensity, or loudness, of a sound can be measured in decibels (dB), according to the equation I(dB)=10log[1/10], where I &a

Alexandra [31]

For this case we have the following equation:
$I(dB)= 10log(\frac{I}{I0})$
Where,
I: the intensity of a given sound
I0: the threshold of a hearing intensity
Substituting values in the given equation we have:
 $I(dB)= 10log(\frac{10^8I0}{I0})$
Rewriting the equation we have:
 $I(dB)= 10log(10^8)$
Then, by properties of logarithm we have:
 $I(dB)= 10(8)$
Finally we have:
 $I(dB)=80$
Answer:
The intensity, in decibles, [I(dB)], when I=10^8(I0) is:
D.80

8 0

4 years ago

Read 2 more answers

Hi! I could really use some help :)

Alekssandra [29.7K]

Answer:

A=330

Step-by-step explanation:

im not sure which is the length width height

but if length is 10

width is 3/5

height is 15