formula= P(x)=.1x^2+50x-300 where x is number sold

Question

what is ans. if P(100)=.1(100)^2+50(50)-300

Answer 1

P(x) = x^2 + 50x - 300,
P(100) = (100)^2 + 50*100 - 300,
P(100) = 10,000 + 5000 - 300 = 14,700.