B -13 -34i
(7 + 2i)(-3 - 4i)
Take the 7 then times it buy the second bracket 7x(-3-4i) then take 2i from the first bracket and times it with the second bracket 2ix (-3-4i)
Then keep simplifying
X^2 = 7^2 + 24^2x^2 =49 + 576x^2 = 625
x = 25
Answer:
Choice C: 6.23
Step-by-step explanation:
=
-----> cross multiply
5(124.50) = 100x
622.5 = 100x

6.225 = x
6.225 rounded to the nearest hundredth is 6.23
She earned 6.23 commission.
You first need to make sure the denominators are equal, then when they are, you can add/subtract the numerators. Then you can place the result over the common denominator.
I hope this helps! :)