What is the sum of 12 – 5i and –3 + 4i? a.) –16 + 63i b.) 9 – i c.) 9 – 9i d.) 15 – 9i

Option B is correct.

Step-by-step explanation:

Given Expressions are 12 - 5i  and -3 + 4i

We have to find the sum of given Expressions.

So,

( 12 - 5i ) + ( -3 + 4i )

= 12 - 5i - 3 + 4i

Group real part and imaginary part together.

= 12 - 3 - 5i + 4i

=( 12 - 3 ) + ( -5 + 4 )i

= 9 + (-1)i

= 9 - i

Therefore, Option B is correct.

false

step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°