Which polynomial equations have - i as one of their roots?

1. x^3 + 5x^2 - 20 = 0

2. x^3 - x^2 + x - 1 = 0

3. x^3 + 3x^2 + x + 3 = 0

4. x^3 - 2x^2 + x - 2 = 0

5. x^3 - 6x^2 - 16x + 96 = 0

Is 0.2487 a interger

Describe the condition so that adding a 50% solution to a 100% solution would produce a 75% solution

Square tablecloth has a perimeter of 12 feet what is the area of the tablecloth

Find the rate as a ratio of distance to time 770km, 5hr

Is thee fifths equivalent to 0.35

Qasim and Alejandra both earn $15 an hour at their job. This week Alejandra worked three hours more than Qasim. If h represents the number of hours Qasim worked, and in total they earned $195, how many hours did each person work?

What is the sum of 0.423 and 4.7

The data set below has an outlier 2,10,10,11,11.12,12,12,13,14,14 Which value is changed the most by removing the outlier

Amber has 19 coins that are dimes and quarters. If they are worth $3.70 then how many dimes and quarters does she have?

How to solve an equation with variables and absoulte value symbols?