Which of the following are solutions to the quadratic equation below? check all that apply x^2+2x-8=0

a.2
b.8
c.6
d.1
e.-4
f.-1

Autility company burns coal to generate electricity. the cost c(p), (in dollars) of removing p percent of the some stack pollutants is given by c(p)= 85000p/100-p a) find the cost to remove 30% of the pollutant b) find where the function is undefined

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.

Which of the following parabolas opens up?