Which is equivalent to (-1 + 2i)(5i)?

A) -11
B) -8
C) -1 + 7i
D) -10 - 5i

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie