I think it is 14 if my calculations are correct.
Hope it helps
A rectangle is a quadrilateral that has two sets of parallel sides. Each side of the rectangle forms a 90 degrees with the other side. If diagonals are drawn, the lines will divide the angle into two having an angle 90 degrees. Therefore, 90 degrees is the answer hope its help you
He is not making a valid inference because he is assuming the student populations interest based on a small part/ group of the student population, his class.
7•x=x-15
I think this would work, if I understood what you were saying correctly.
