Beth has 2000 feet of fencing available to enclose a rectangular field. one side of the field lies along a river, so only three sides require fencing. express the area a of the rectangle as a function of x, where x is the length of the side parallel to the river.

Step-by-step explanation:

Perimeter (P) is the total length of the fencing which covers 2 sides of one length and 1 side of another length (because the side along the river does not need fencing).  So, P = 2L+ x  where L is the length and x is the width.

P = 2000 and P = 2L + x   →   2000 = 2L + x

Area (A) is length x width  →  A = L × x

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

fd

step-by-step explanation: