Multiply −3i(−8 + 7i). what is the simplified version written in standard form, a + bi, where a and b are real numbers?

−21 + 24i
21i2 + 24
21 + 24i
−4 − 11i

The distance between two cities is 368 miles. if the scale on the map is 1/4 inch=23 miles, what is the distance between the cities on the map?

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?