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2 years ago

What is the perimeter of triangle DEF

Mathematics

2 answers:

LuckyWell [14K]2 years ago

7 0

Remember that A squared plus B squared equals C squared.

Since sides F_D and D_E are both 3, the answer cannot be 4.2 or 2.4.

SO basically you just add 3 + 3 = (The side F_E, which you can get by putting numbers in the formula), you should get your answer.

3² + 3² = Line EF²
9 + 9 = Line EF²
18 = Line EF²
√18

You get the idea. Hope this helps!

frozen [14]2 years ago

3 0

Answer:

i took this quiz and the answer is 10.2 units good luck

Step-by-step explanation:

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Expand and combine like terms.<br> (3c^4-5c^6)^2

lora16 [44]

Answer:

$9c^{8} -30c^{10} + 25c^{12}$

Step-by-step explanation:

We can use formula (a-b)² = a² -2ab + b².

In our example a = 3c^4 and b = 5c^6

$(3c^{4} - 5c^{6})^{2} = [3c^{4} ]^{2} - 2*3c^{4} *5c^{6} + [5c^{6}]^{2}=\\=9c^{8} -30c^{10} + 25c^{12}$

4 0

2 years ago

An amusement park charges an admission fee of 40 dollars per person. The cost, C (in dollars), of admission for a group of P peo

timama [110]

The answer is $80 because it's $40 per person so two people is $80

4 0

2 years ago

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

Find the center and radius of the circle.<br> (x + 3)2 + (y + 4)2 =9

Tpy6a [65]

The general equation for any circle with its center at point (a, b) is

(x - a)² + (y - b)² = (radius)²

So the circle in the question is centered at (-3, -4), and its radius is 3 .

7 0

3 years ago

How many moles of NH3 will be produced if 2 moles of N2 reacts with excess H2 gas?

skad [1K]

Answer:

2 moles of N₂ will produce 4 moles of NH₃

Step-by-step explanation:

Equation of reaction

N₂ + 3H₂ → 2NH₃

The process above is the Born-Harber method of producing ammonia NH₃ industrially.

From the equation of reaction,

1 moles of N₂ will produce 2 moles of NH₃

1 moles N₂ = 2 moles NH₃

2 moles of N₂ = x moles of NH₃

x = (2*2) / 1 = 4moles of NH₃

2 moles of N₂ will produce 4 moles of NH₃

5 0

2 years ago