Answer:
Step-by-step explanation:
If congruent the sides are equal
15x-9=7x+11
8x=20
x=20/8=2.5
Answer:
Tye answer is 5 becuase 5*31=195 and 200-5=195
The equation of line parallel to
and containing the point(-10,-3) is 
Step-by-step explanation:
We need to write the equation parallel to
and containing the point(-10,-3)
The standard form of point slope equation is:

where m is slope and b is y-intercept
Comparing the given equation
with standard form the slope is m= -1/5
Since the lines are parallel the slope of new line is m = -1/5
Now finding b (y-intercept)
Using slope m=-1/5 and point (-10,-3)

So, b= -5 and slope = -1/5 the equation of new line is:

So, The equation of line parallel to
and containing the point(-10,-3) is 
Keywords: Point Slope form
Learn more about point slope form at:
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When we rotate a figure and there is no change in the shape of the figure then it has rotational symmetry.
We know that the order of rotation for a square is 4.
Hence, we have 
Thus, the angle of rotational symmetry of square are

Hence, the minimum angle of rotational symmetry is 
Therefore, the minimum angle of rotational symmetry for a square is 90 degrees.
Answer:
a+b+2
Step-by-step explanation: