Correct the error a student made when multiplying complex numbers. (2 - 3i) (4 + i) =2 (4) + 2 (i) - 3i (4) - 3i (i)
= 8 + 2i - 12i - 3i2
= 8 - 10i - 3i2

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

What is the point slope form of a line with slope -5 that contains point (2,-1)