9514 1404 393
Answer:
D. 28 +10i
Step-by-step explanation:
As with any "collect terms" problem, you first identify the like terms, then add their coefficients. You can start with either the real or the imaginary terms to obtain a result that will point you to the correct answer choice. Of course, the distributive property works in the usual way.
(3i+ 4) -i + 4(6 +2i) = 3i +4 -i +24 +8i . . . . eliminate parentheses
= (4 +24) +(3 -1 +8)i . . . . . . . group like terms
= 28 +10i
Answer:
He still owes $105
Step-by-step explanation:
First, we have to find how much money Marco had paid back.
We are going to find the percentage of the number:

Then, doing a simple mathematical subtraction we can find how much money he still owes to his brother:

Answer:
(−3x−5)(3x+5)
Step-by-step explanation:
−9x2−30x−25
−9x2−30x−25
=(−3x−5)(3x+5)
Answer:
I think it's 7.93725
I'm not sure if I did this correctly
The center = (-9/2 , 4)
Radius = square root 129 / 2