URGENT
Plz help me with this.

Which event must happen for a case to be heard before the supreme court? a five of the nine justices must agree to hear the case. b three of the nine justices must agree to hear the case. c six of the nine justices must agree to hear the case. d four of the nine justices must agree to hear the case.

What impact did improvements in farming technology near the end of the nineteenth century have on the american economy? a. more energy was needed to power equipment, creating the renewable energy industry. b. less labor was necessary on farms, leading workers to pursue other jobs. c. less money was invested in farming as many locally owned farms went bankrupt. d. more demand for agricultural products reduced the price of food and animal products.

The purpose of laws were to restrict the rights of african americans who lived in southern states. a) "jim crow" b) "civil rights" c) "anti prohibition" d) "reconstruction acts"