Answer:
x = 13
Step-by-step explanation:
Combine like terms:
3/5x (x + 2 ) = x - 4
3/5x + 6/5 = x - 4
<u>-x -x</u>
-2/5x + 6/5 = -4
<u>- 6/5 -6/5</u>
-2/5x = -26/5
divide everything by -2/5
Your final answer should be 13.
You can double-check by substituting 13 into the original equations.
Answer:
its 36 because i said so
Step-by-step explanation:
becuase i am papi
Alright, here are the divisibility rules:
2 -- If the last digit is 0, 2, 4, 6, or 8.
3 -- If the sum of the digits is divisible by 3.
4 -- If the last two digits are divisible by 4.
5 -- If the last digit is 0 or 5.
6 -- If the number is divisible by 2 or 3.
7 -- Cross off the last digit, double it, and subtract. If new number is divisible by 7, the original number is divisible by 7.
8 -- If the last three digits are divisible by 8.
9 -- If the sum of the digits is divisible by 9.
10 -- If the last digit is 0.
11 -- Subtract the last digit from the number formed by the remaining digits. If new number is divisible by 11, the original number is divisible by 11.
12 -- If the number is divisible by 3 and 4.
Let's use these rules to answer your questions.
Is 26 divisible by 2?
Answer: C.
Is 216 divisible by 3?
Answer: B.
Is 40,100 divisible by 10?
Answer: C.
Is 318 divisible by 9?
Answer: A.
Is 87,235 divisible by 5?
Answer: B.
Is 43,121 divisible by 3?
Answer: A.
Is 1,112 divisible by 5?
Answer: A.
Is 10,000,058 divisible by 10?
Answer: A.
Is 94,032 divisible by 9?
Answer: B.
Is 201,086 divisible by 2?
Answer: C.
Well, that answers all of your questions! :)
The intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²
Decibel level, dB = 10log₁₀(I/I₀) where dB = decibel level = 156, I = intensity at 156 dB and I₀ = 10⁻¹² W/m².
Since we require I, making I subject of the formula, we have
dB/10 = log₁₀(I/I₀)
![\frac{I}{I_{0} } = 10^{\frac{dB}{10} } \\I = I_{0} 10^{\frac{dB}{10} }](https://tex.z-dn.net/?f=%5Cfrac%7BI%7D%7BI_%7B0%7D%20%7D%20%3D%2010%5E%7B%5Cfrac%7BdB%7D%7B10%7D%20%7D%20%5C%5CI%20%3D%20I_%7B0%7D%2010%5E%7B%5Cfrac%7BdB%7D%7B10%7D%20%7D)
Substituting the values of the variables into the equation, we have
![I = I_{0} 10^{\frac{dB}{10} }\\I = 10^{-12} 10^{\frac{156}{10} }\\I = 10^{-12} 10^{15.6}\\I = 10^{15.6-12} \\I = 10^{3.6} W/m^{2}](https://tex.z-dn.net/?f=I%20%3D%20I_%7B0%7D%2010%5E%7B%5Cfrac%7BdB%7D%7B10%7D%20%7D%5C%5CI%20%3D%2010%5E%7B-12%7D%2010%5E%7B%5Cfrac%7B156%7D%7B10%7D%20%7D%5C%5CI%20%3D%2010%5E%7B-12%7D%2010%5E%7B15.6%7D%5C%5CI%20%3D%2010%5E%7B15.6-12%7D%20%5C%5CI%20%3D%2010%5E%7B3.6%7D%20W%2Fm%5E%7B2%7D)
I = 3981.072W/m²
I = 3.981 × 10³ W/m²
So, the intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²
Learn more about intensity of sound here:
brainly.com/question/4431819