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Leya [2.2K]
3 years ago
9

Which statements are true about the reflectional symmetry of a regular heptagon?

Mathematics
2 answers:
seropon [69]3 years ago
5 0
The answer is option C:
<span>A line of symmetry will connect a vertex and a midpoint of an opposite side.
It has 7-fold symmetry.</span>
Sav [38]3 years ago
3 0

Answer: D and F

There are two answers

Step-by-step explanation:

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Pleaseeeeee solve this!
Kobotan [32]

Answer:

C

Step-by-step explanation:

One graph line is equal to 10km and there is 2 graph lines between Red Bank and Belleville.

6 0
3 years ago
Read 2 more answers
The lengths of the sides of a triangle are 3, 4, 5. Can the triangle be a right triangle?
attashe74 [19]
Yes, this is a typical pythagorean triad.

Since the theorem is: c^{2} =  a^{2} +  b^{2}
And by inspection, 5^{2} would be the hypotenuse,
5^{2} =  3^{2} +  4^{2}
25 = 9 + 16
RHS = 9 + 16 = 25 = LHS
Therefore, we have proved that the values fit into pythagoras' theorem, which means that the triangle is a right triangle (that is the central idea of this theorem).
3 0
3 years ago
PLEASEE ANSWER I'LL MARK U BRAINLIEST IF U DO!!!!!!!!!!!!!
alex41 [277]

Answer:

but i would say t t f t

Step-by-step explanation:

Are u wrong or right

4 0
3 years ago
3x - 8y = 29
ICE Princess25 [194]

Answer:

The best estimate for the solution is the point (0.5,-3.5)

Step-by-step explanation:

we have

-----> equation A

-----> equation B

we know that

The solution of the system of equations is the intersection point both graphs

Using a graphing tool

The intersection point is

see the attached figure

therefore

The solution of the system of equations is the point

The best estimate for the solution is the point

8 0
4 years ago
A certain batch of fireflies was observed to "flash" at the rate of 20.8 times per minute at 25°C, and at the lower rate of 5.0
yanalaym [24]

Answer:

the activation energy for the slowest step is Ea= 101.7 kJ/mol

Step-by-step explanation:

Since the concentrations do not vary with temperature, the ratio of reaction rates at different temperatures is the ratio of specific reaction rates:

r₂/r₁ = k₂/k₁ , where 1 represents the scenario with T=25°C and 2 the scenario of 15°C

then knowing Arrhenius equation

k₂=k₀*e^([-Ea/(R*T₂)] and k₁=k₀*e^([-Ea/(R*T₁)]  

where k₀= collision factor , Ea= Activation energy , R= ideal gas constant=8.316 J/mol*K, T= absolute temperature

therefore

k₂/k₁ = e^([-Ea/(R*T₂)+Ea/(R*T₁)]

ln (k₂/k₁) = Ea/R (1/T₁- 1/T₂)

Ea = R*ln (k₂/k₁) / (1/T₁- 1/T₂)

replacing values ,

T₂= 25°C= 298K , T₁= 15°C=288K

Ea= R*ln (k₂/k₁) / (1/T₁- 1/T₂) = 8.316 J/mol*K* ln(20.8/5) / (1/288 K - 1/298 K ) = 101740.77 J/mol = 101.7 kJ/mol

5 0
3 years ago
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