The length of a rectangle is twice the width. the perimeter is 90 inches. what is the rectangles area? you write the equation 2w+2w+w+w=90 for the word problem. you solve and get 15. what is the answer to the problem? A) The area is 450 in^2
B) The width is 15 inches.
C) The area is 112.5 in^2
D) The length is 30 inches.

Which system of linear inequalities is represented by the graph?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

State one method by which you can recognize a perfect square trinomial.