Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.

A. {(-4, 2)}
B. {(-4, -2)}
C. no solution; ?
D. {(-2, -4)}


Answer: B

Mathematics

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Insert < or > to make the statement true.-2 _____ -3

A. > B. <

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Solve.Find the equilibrium point for the given supply and demand functions. Here y represents price and x represents quantity. y = 3230 - 90x (demand) y = 100x (supply)

A. 10, $1700 B. 32, $350 C. 10, $2330 D. 17, $1700

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Write the decimal as a proper fraction or mixed number in lowest terms.-0.8

A. -  
B. - 
C. - 
D. - 

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The number of research articles in Physics Review that were written by researchers in the U.S. from 1983 through 1996 can be approximated by  hundred articles (t is time in years since 1983). ? Find an appropriate domain of A. ?

A.
B.
C.
D.
E.

Mathematics