Given that new DVDs are selling for $12 and used for $7, then Joseph is buying:
12·2 + 7<em>x </em>=
Answer: -iSimplify the expression using the definition of an imaginary number
i
=
√
−
1
.
−
i
Step-by-step explanation: Simplify the expression using the definition of an imaginary number i
=
√
−
1
.
−
i
we know that
The conjugate of a complex number is the number with equal real part and imaginary part equal in magnitude but opposite in sign
so
In this problem we have

the conjugate is equal to--------> 
therefore
<u>the answer is the option</u>
10+3i
Answer:
hi! i'm so sorry about your headache, hope it gets better !
still need help?
Step-by-step explanation: