PLEASE HURRY THIS IS DUE IS IN 10 MINS !! Please explain the importance of the Dred Scott v Sandford 1857 Supreme Court case. What was the decision? How did this decision change the conversation surrounding slavery in the United States?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%