Thirty feet of plastic pipe costs $19.50. What is the unit cost? A) $0.56 per foot
B) $0.65 per foot
C) $0.75 per foot
D) $1.54 per foot
show work pl :)

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Multiply. write your answer in simplest form. 3/8 x 5/7

Solve x+3y=6 and 4x-6y=6 by elimination . show work !