Q1). Rekha runs along the sides of a triangular garden whose sides are 35 m, 25 m and 20 m. If she covers 50 cm in one step, how many steps will she take to run once round the garden?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

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?