Quadrilateral ABCD is represented by the vertices A(-5,-1), B(-4,3), C(8,0) and D(7,-4). Prove ABCD is a parallelogram.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.