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ryzh [129]
3 years ago
14

If 2x + 16 = -6x what is x

Mathematics
2 answers:
Scrat [10]3 years ago
7 0

Answer:

x = -2

Step-by-step explanation:

mr_godi [17]3 years ago
5 0

Answer:

x is -2

Step-by-step explanation:

8x+16=0

subtract 16 from both sides

8x=-16

Divide each term by 8 and simplify

x=-2

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What is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2?
horsena [70]

Given: Sound Intensity ( I ) = 9.9 \times  10^{-5}\frac{watts}{m^2}

We know,  the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is =\frac{9.9 \times  10^{-5}}{10^{-12}}⁻¹² W/m².

So, we can say,  Reference sound intensity(I_0) = 10⁻¹² W/m².

We have formula for "sound intensity level LI in dB" when entering sound intensity.

LI = 10×log (I / Io)  in dB

Plugging values of I and Io in formula.

LI = 10 × log (\frac{9.9 \times  10^{-5}}{10^{-12}})

LI = 10 × log (99000000)

= 10 × 7.99564

LI = 79.96 dB.

Therefore,  79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.

8 0
3 years ago
A circular running track 1/3 is mile long. Elena runs on this track, completing each lap in 1/15 of an hour. Elena's running spe
jek_recluse [69]

Answer:

2.22m/s

Step-by-step explanation:

Distance = Velocity/Time

533.33m = V/4minutes

V = 533.33/240 seconds

V = 2.22m/s

3 0
3 years ago
Complete the pattern <br> _,_,_,0, 2, 4,6<br><br> A)-1, -2, -3<br> B) -2,-4, -6<br> C) -6, -4,-2
ivann1987 [24]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Answer asap pls will give brainliest.
Llana [10]

Answer:

Answer is the third one/ or c

Step-by-step explanation:

4 0
4 years ago
The first three terms of an arithmetic sequence are as follows.-1, 3, 7Find the next two terms of this sequence
Schach [20]
<h2>Answer:</h2>

11 and 15

<h2>Explanations:</h2>

Given the arithmetic sequence -1, 3, 7 __, __, you are to find the next two terms of the sequence.

The nth term of an arithmetic sequence is given as;

T_n=a+(n-1)d

where:

• a is the ,first term

,

• n is the ,number of terms

,

• d is the ,common difference

From the given sequence;

a = -1

d = 3 - (-1) = 7 - 3 = 4

For the fourth term, n = 4;

\begin{gathered} T_4=-1+(4-1)\cdot4 \\ T_4=-1+3(4) \\ T_4=-1+12 \\ T_4=11 \end{gathered}

For the fifth term, n = 5;

\begin{gathered} T_5=-1+(5-1)\cdot4 \\ T_5=-1+4(4) \\ T_5=-1+16 \\ T_5=15 \end{gathered}

Therefore the next two terms of the arithmetic sequence are 11 and 15.

8 0
1 year ago
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