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 :)

Y=4x^2+x-1 solve using quadratic formula

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

What expression is equivalent to (2x-1)(x-3)?