To eliminate the i in the denominator, you multiply it by (6+5i), because (a+b)(a-b)=a²-b², we need i² to eliminate i. Recall that i²=-1
-1(6+5i)/(6-5i)(6+5i)=(-6-5i)/[6²-(5i)²]=(-6-5i)/(36-25i²)=(-6-5i)/61
your choices are all correct. You need to check the 7th answer as well.
The answer is: 12x5+x3+9x2+4
This is the correct answer because all of the exponents are in the correct calculation and the numbers as well.
I hoped this helped! :)
You would write AB with a horizontal line segment over the letters A and B
So you would write this ![\overline{AB}](https://tex.z-dn.net/?f=%5Coverline%7BAB%7D)
If you cannot draw that on your computer, then I would stick to saying "segment AB".
Answer:
A
Step-by-step explanation:
x + y = 4a + 7
x - y = 2a + 5
In both equations, make x the subject of the formula
x = 4a + 7 - y equation 1
x = 2a + 5 + y equation 2
Subtract equation 2 from equation 1
2a + 2 -2y
= 2a + 2
She can 18 because 40.00 divided by 2.50 is 18 :)