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3 years ago

I WILL MARK BRAINLIEST!

2 answers:

7 0

Hey looks like u need help I'll help you,

So you'll need your cal for this. But I'll help anyway

A= x(4x-2) then distribute the x to get A=4x²-2x

Then plug in the 8 and get A=4(8)²-2(8)
A=256-16
A=240
Answer is 240

ipn [44]3 years ago

3 0

The answer is 4x2-5x;Area= 114 in2 i think

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2. Devin is holding a skating party, The rental of the ice is $75, plus S3 Dex karex. Devi has

nasty-shy [4]

Answer:

Step-by-step explanation:

204-75=129

129/3=43

8 0

2 years ago

Which of the following shows the number 7.12 x 10^-3 written in standard form? Answer choices : 0.00712 : 0.0712 : 0.712 : 7,120

svet-max [94.6K]

written in standard form

7.12 x 10^-3 = 0.00712

hope it helps

7 0

3 years ago

What is the value of x?

Alexxandr [17]

Answer:

Step-by-step explanation:

2x+2=3x-52

-2x -2x

2=x-52

+52 +52

54=x

7 0

3 years ago

3. Let h(t) = 16t – 4t -1. Evaluate h(3).

Anika [276]

Answer:

h(3) = 35

Step-by-step explanation:

Simplify h(t) = 16t - 4t - 1 to h(t) = 12t -1

Then, plug 3 into the t

h(3) = 12*3 - 1 = 36 - 1 = 35

5 0

2 years ago

Read 2 more answers

Given that <img src="https://tex.z-dn.net/?f=I_0%20%3D%2010%5E-12" id="TexFormula1" title="I_0 = 10^-12" alt="I_0 = 10^-12" alig

Alex Ar [27]

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)

$\frac{I}{I_{0} } = 10^{\frac{dB}{10} } \\I = I_{0} 10^{\frac{dB}{10} }$

Substituting the values of the variables into the equation, we have

$I = I_{0} 10^{\frac{dB}{10} }\\I = 10^{-12} 10^{\frac{156}{10} }\\I = 10^{-12} 10^{15.6}\\I = 10^{15.6-12} \\I = 10^{3.6} W/m^{2}$

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

3 0

2 years ago