Answer:
1/6 of the students in Robert's grade have both a sister and a brother.
Explanation:
Let x be the number of total students in Robert's grade.
It is given that In Robert's grade, 1/3 of the students have a sister.
Number of students have a sister = 
Of the students who have a sister, 1/2 also have a brother.
Number of students have both a sister and a brother = 
We need to find the fraction of the students in Robert's grade have both a sister and a brother.

Therefore, 1/6 of the students in Robert's grade have both a sister and a brother.
Answer:
Las dos primeras serían más bien formas de gobierno, mientras que la tercera es ... todo el poder no delegado por esta constitución al gobierno federal, y el que ... típicas en la estructura federal son: i) de subordinación, en razón de la cual los ... de regiones y celebración de convenios internacionales) son tan importantes
Explanation:
Democratic-Republican Thomas Jefferson defeated Federalist John Adams by a margin of seventy-three to sixty-five electoral votes in the presidential election of 1800. When presidential electors cast their votes, however, they failed to distinguish between the office of president and vice president on their ballots. Jefferson and his running mate Aaron Burr each received seventy-three votes. With the votes tied, the election was thrown to the House of Representatives as required by Article II, Section 1 of the U.S. Constitution. There, each state voted as a unit to decide the election.
Still dominated by Federalists, the sitting Congress loathed to vote for Jefferson—their partisan nemesis. For six days starting on February 11, 1801, Jefferson and Burr essentially ran against each other in the House. Votes were tallied over thirty times, yet neither man captured the necessary majority of nine states. Eventually, Federalist James A. Bayard of Delaware, under intense pressure and fearing for the future of the Union, made known his intention to break the impasse. As Delaware’s lone representative, Bayard controlled the state’s entire vote. On the thirty-sixth ballot, Bayard and other Federalists from South Carolina, Maryland, and Vermont cast blank ballots, breaking the deadlock and giving Jefferson the support of ten states, enough to win the presidency."
Answer:
speed = distance/time (or s = d/t)
They have to contain certain products such as zinc, titanium Oxendine to be fda approved