The simplest form to (-6 – 5i) (1 + 3i) is
(Required)
(13
(a) 2 - 3i
14)
(b) 9+23i
(C) 9- 23i
(d) 7+ 3i
OD
Ос
B

Step-by-step explanation:

(-6 - 5i)(1 + 3i)

= -6 - 23i - 15i²

= 9 - 23i

b. 2

step-by-step explanation:

the slope of a line =δy/δx

δy= y₂-y₁

δx= x₂-x₁

therefore, using the points (-2,-3)   and (3,7) we can calculate gradient as follows:

m=(7--3)/(3--2) (a number minus a negative number the sign changes to a plus)

m=(7+10)/(3+2)

=10/5

=2

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24