Which of these powers is shared betwen states and the federal government

Under president reagan, the united states began to develop the strategic defense initiative, nicknamed "star wars.” what was the goal of that plan?

If f(x) = 3x + 2 and g(x) = 2x - 2. what is (f - g)(x)?

How did world war 1 impact the lives of women in the united states following world war 1