(01.02 MO Which of the following expressions shows how to rewrite 8 - 9 using the additive Inverse and displays the expression correctly on a number
line? (5 points)
O
8+(-9)
2
Oь
8+(-9)
->
8-(-9)
-
.
Od
8-(-9)

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?