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3 years ago

Pls help giving brainlyist

Mathematics

1 answer:

dangina [55]3 years ago

5 0

Answer:

x = 0

Step-by-step explanation:

when y is -3, x is 0

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PLEASE HURRY IM TIMED!!!

andriy [413]

Answer-

A. Brandon’s sound intensity level is 1/4th as compared to Ahmad’s.

Solution-

Given that, loudness measured in dB is

$L=10\log \frac{I}{I_0}$

Where,

I = Sound intensity,

I₀ = 10⁻¹² and is the least intense sound a human ear can hear

Given in the question,

I₁ = Intensity at Brandon's = 10⁻¹⁰

I₂ = Intensity at Ahmad's = 10⁻⁴

Then,

$L_1=10\log \frac{I_1}{I_0}=10\log \frac{10^{-10}}{10^{-12}}=10\log \frac{1}{10^{-2}}=10\log 10^{2}=2\times10\log 10=20$

$L_2=10\log \frac{I_2}{I_0}=10\log \frac{10^{-4}}{10^{-12}}=10\log \frac{1}{10^{-8}}=10\log 10^{8}=8\times10\log 10=80$

$\therefore \frac{L_1}{L_2} =\frac{20}{80} =\frac{1}{4}$

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3 years ago

If f(x)=2x-6,then f-1(x)=?

snow_tiger [21]

Answer:

2x-6

Step-by-step explanation:

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3 years ago

7divided by 43.4 pls help

Vikki [24]

0.161 (they said explain it so)

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3 years ago

1. What is the area of the figure below? (1 point)

maw [93]

Answer: 36in2

Step-by-step explanation:

A= base *height

=12*3

=36

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3 years ago

What is 2x^2-8x factorised*

Otrada [13]

Answer:

2x(x - 4)

Step-by-step explanation:

$2 {x}^{2} - 8x \\ \\ = 2x(x - 4)$

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3 years ago