The liu family buys 20 pounds of chicken at the local market for 50 dollars which equation can be used to represent the coast c of buying x pounds of chicken at the same price per pound A) C=20x
B) c=0.4x
C. C=2.5x
d) c=50x

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

Ineed to learn how to solve this problem

Ammonia molecules have three hydrogen atoms and one nitrogen atom. how many of each atom arein five molecules of ammonia