Question

1)how is the supreme court equal to the other branches of government?

Answer 1

1. D.  The Supreme Court interprets the law and has the final say in federal law. 
"The final say" means the determination of whether a law passed by Congress or an executive order signed by the President is constitutional or not.  Each branch of government has powers that serve as checks and balances on each other.

2. A.  Deciding the constitutionality of a law is what happens when the Supreme Court exercises its power of judicial review.  
I referred to this in my explanation to question #1, and the upcoming question #3 is pertinent also.  The case, Marbury v. Madison (1803) is considered the landmark case establishing the Supreme Court's authority in regard to judicial review.  (That power was not spelled out specifically in the US Constitution.)

3. D. The Supreme Court has the right to declare laws of Congress unconstitutional. 
It was sort of a roundabout way in which the principle of judicial review was asserted by the Supreme Court in the case of Marbury v. Madison. William Marbury had been appointed Justice of the Peace for the District of Columbia by outgoing president John Adams -- one of a number of such last-minute appointments made by Adams.  When Thomas Jefferson came into office as president, he directed his Secretary of State, James Madison, not to deliver many of the commission papers for appointees such as Marbury.  Marbury petitioned the Supreme Court directly to hear his case, as a provision of the Judiciary Act of 1789 had made possible.  The Court said that particular provision of the Judiciary Act was in conflict with Article III of the Constitution, and so they could not issue a specific ruling in Marbury's case (which they believe he should have won). 

Answer 2

1. How the Supreme Court is equal to the other branches of government is that it interprets the laws and has the final decision when it comes to the federal law. Answer is D. 2. An example of the Supreme Court using the judicial review power is making decisions regarding the constitutionality of a law. Answer is A. 3. What Chief Justice John Marshall was trying to say when he wrote "A law repugnant to the constitution is void" is that the Supreme Court has the right in the declaration of laws of Congress Unconstitutional. Answer is D.