What are the possible steps involved in solving the equation shown? check all that apply.

3.5 + 1.2(6.3 – 7x) = 9.38

add 3.5 and 1.2.

distribute 1.2 to 6.3 and –7x .

combine 6.3 and –7x .

combine 3.5 and 7.56.

subtract 11.06 from both sides.

divide both sides by 9.38.

Pls brainliest will be awarded if answer is correct

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?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.