Which phrase best defines a rhombus?
a. a parallelogram with four congruent angles
b. a parallelogram with four congruent sides
c. a quadrilateral with exactly one pair of parallel sides
d. a quadrilateral with no congruent sides sorry, a little fuzzy on my shapes right now.?

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c, with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)