Trapezoid A B C D is shown. Diagonals are drawn from point B to point D and from point A to point C and intersect at point E. If quadrilateral ABCD is an isosceles trapezoid, which statements must be true? Select three options

BC ∥ AD
BD ⊥ AC
BA ≅ CD
BE ≅ ED
∠CBA ≅ ∠BCD

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

What’s 8y+48 and factor each expression completely

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?