The value of x is 23 because BC and EF are equal
Answer:
In the given figure:
The reflex angle 
and 
[By vertical angle theorem]
From the given we can say that:
and 
are supplementary angles.
Supplementary angles states that the two measure are add up to 180 degree.
⇒ 
.....[1]
then; the reflex angle DOB is:
Substitute the given values we get;
Subtract y from both sides we get;
Divide both sides by 2.5 we get;
We have to find the non reflex 
Non reflex angle DOB is;
Therefore, the non-reflex angle DOB is 108 degree.
Answer:
This system of equations has <em>no solution</em>. It is inconsistent.
Step-by-step explanation:
The last equation tells you z = -1.
Substituting this value for z in the other two equations allows them to be written as ...
-3x -y = 7
-3x -y = 3
There are no values of x and y that can make both these equations true.
Answer:
x = 1
y = - 1
Step-by-step explanation:
-8x - 3y = -5
-2x + 7y = -9 | × (-4)
-8x - 3y = - 5
8x - 28y = 36 +
________________
- 8x + 8x - 3y - 28y = - 5 + 36
- 31y = 31
31y = - 31
y = - 1
- 8x - 3(-1) = - 5
- 8x + 3 = - 5
- 8x = - 8
8x = 8
x = 1
