Plz help. Due today.

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)