What is the equation of a line passing through the point (a, b) and having a slope of b?
a. y = −bx − b(1 − a)
b. y = bx − b(a − 1)
c. y = 1/b x + b(a - 1)
d. y = -1/b x + b(1 - a)

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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?