An equation is formed of two equal expressions. The given equation is not true.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The complete question is: Check whether the given equation is true or not?cos2pi/7+cos4pi/7+cos8pi/7=1/8.
To know if the given equation, 
is true or not, both the sides of the equation are needed to be solved separately.
The value of 
when simplified is equal to -0.5, or the value can be written as -(1/2).
Since the right side of the equation is equal to -1/2, while the right side of the equation is 1/8. Thus, the given equation is not true.
Hence, the given equation is not true.
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Answer: Length: 14; Width: 4
Step-by-step explanation:
Answer:
- 4x³ - 5x²
Step-by-step explanation:
-x²(-x² + 4x + 5) Distribute
- 4x³ - 5x²
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Answer:
39%
Step-by-step explanation:
It is given that 35 apartments have balconies in them.
While 55 apartments do not have balconies in them.
Total number of balconies is the sum of the apartments. i.e. 35 + 55
= 90 apartments
Therefore for the survey when an apartment is randomly selected, the percentage of the probability of the apartment to have a balcony can be found out by dividing 35 by 90 and then multiply by 100.
i.e.
= 0.38888888
Multiplying by 100, we get
= 0.388888 x 100
= 38.8888 %
= 39 %
Answer:
Step-by-step explanation:
Let us write the equations in standard form:
We have
and
Since the eccentricity of this conic is less than 1, the conic represents an ellipse.
The second equation is 
.
This is a hyperbola, because eccentricity is more than 1.
The third equation is 
.
This is a parabola, because eccentricity is 1.
The fourth equation is 
.
This is also a hyperbola, because eccentricity is more than 1.
