Solve the equation and express each solution in a + bi form.
x^4+7x^2-18=0

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.