4. The profits from selling T-shirts at store A are shown in the graph. The profit y for
selling x T-shirts at store B is represented by
the equation y = 3.75r. Which of the
following statements is true?
120
Profit ($)
40
F. Store A made a greater profit per T-shirt.
G. Store B made a greater profit per T-shirt.
H. Store A made a profit of $3.50 per
T-shirt
L. Store B made a profit of $4 per T-shirt.
0
10
30
Number Sold

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?