From the information given in the figure, what is DB?
15
2x + 3.5
3x + 1.5
O A. 2
B.6
O c. 7.5
OD. cannot be determined

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?

What is negative 3/9 times negative 2/8 ?

Plz hurry evaluate the expression a+b where a=8 and b=19