If the area of parallelogram ABCD is 27 square feet, what is the area of triangle ABC?

A. 13.5 ft 2
B. 27 ft 2
C. 13 ft
D. 54 ft 2

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Given that abcd is a rhombus, what is the value of x?