The product of a complex number and its complex conjugate ist
a real number
(a+bi)(a-bi) = a?
(bi?) = a + b
2

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.