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lutik1710 [3]
3 years ago
6

100 POINTS! ANSWER QUICK!

Mathematics
1 answer:
eimsori [14]3 years ago
3 0

Answer:

First choice.

Step-by-step explanation:

7 is added to each term starting from the first term (-4)

So its the first choice.

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PLEASE HURRY IM TIMED!!!
andriy [413]

<u>Answer-</u>

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

<u>Solution-</u>

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}

5 0
3 years ago
Help me pls pls pls​
9966 [12]

Answer:

B

Step-by-step explanation:

Plug in a x-value and see which table matches the result.  Plug in 1.

f(x) = 7 - 4.5x

f(1) = 7 - 4.5(1)

f(1) = 7 - 4.5

f(1) = 2.5

The table that matches an input of 1 with an output of 2.5 is B.

6 0
3 years ago
.3 3. True or False? For any integer m, 2m(3m + 2) is divisible by 4. Explain to get credit.
Sav [38]

Answer with explanation:

We have to prove that, For any integer m, 2 m×(3 m + 2) is divisible by 4.

We will prove this result with the help of Mathematical Induction.

⇒For Positive Integers

For, m=1

L HS=2×1×(3×1+2)

      =2×(5)

       =10

It is not divisible by 4.

⇒For Negative Integers

For, m= -1

L HS=2×(-1)×[3×(-1)+2]

      =-2×(-3+2)

       = (-2)× (-1)

       =2

It is not divisible by 4.

False Statement.

4 0
3 years ago
What is the answer for this question 7(x+4)-7=48-2x
Alex777 [14]

Answer:

x = 3

Step-by-step explanation:

7(x + 4) - 7 = 48 - 2x ← distribute parenthesis and simplify left side

7x + 28 - 7 = 48 - 2x

7x + 21 = 48 - 2x ( add 2x to both sides )

9x + 21 = 48 ( subtract 21 from both sides )

9x = 27 ( divide both sides by 9 )

x = 3

8 0
2 years ago
Read 2 more answers
What percent of 21 is 105? ​
Natasha_Volkova [10]

Answer:

20%

Step-by-step explanation:

21/ 105

= 0.2 x 100

20%

6 0
3 years ago
Read 2 more answers
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