Answer:
19
Step-by-step explanation:
just do the math
Reflectional symmetry is the mirror image of one side of image to the other when we divide the image. In other words it is one half of image is the reflection of other half of image.
In isosceles trapezoid, the length of the sides are same . the bases are not same.
When we draw a vertical line in the middle of isosceles trapezoid, the left side of the image is the reflection of right side .
So there is only one line of reflection symmetry.
After reducing the fraction it becomes equal to 5/12. Let the common element which was cancelled out be x. So we can say the original fraction was

.
The denominator of the fraction is 147 greater than the numerator. We can write it as:
12x = 147 + 5x
12x - 5x = 147
7x = 147
x = 21
So, the numerator of the fraction was 5 x 21 = 105
Denominator of the fraction was 12 x 21 = 252
So our original fraction was
A) 3.9a+b hope this helps