From a standard deck of cards, your first draw is a black card. You replace the card, and the second draw is a diamond. Which THREE statements are correct for the outcome of the event?
A)
The probability of drawing the black card is
B)
The probability of drawing the diamond is
1
4
The probability of the compound event is
D)
The probability of the compound event is
E)
3
The probability of the compound event is
4.
.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?