The correct answer is: Opposite angles of a parallelogram are congruent.
In a parallelogram, the opposite angles are always congruent. The opposite angles are the angles diagonal across from each other.
You can tell by the order of ABCD that A and C are opposite. B and D are also opposite of each other and congruent.
The answer is x = -4 or x = 9
First off, the function above is incomplete, however, by the looks of it, likely a quadratic, anyway, the values "x" can safely take on would be all real numbers, thus -∞ < x < +∞
Inequalities are used to relate unequal expressions
The greatest whole number of square yards the teacher can buy is 4
The inequality is given as:

When the <em>number of square yards </em>of the white fabrics is 10.
It means that: x = 10
So, we have:


Collect like terms


Divide both sides by 10

The above inequality means that:
The greatest whole number of square yards the teacher can buy is 4
Read more about inequalities at:
brainly.com/question/15137133