Use the substitution method to solve the system of linear equations. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.x + y = -4x - y = 11
A. (3.5, -7.5)
B. (4, -7.5)
C. (4, 3.5)
D. (3.5, 7.5)
Answer: A
Mathematics
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Solve the equation.
+ 5 = 10
A. 
B. ?
C. {95}
D. 
Mathematics
Write as a percent.6
A. 300% B. 0.6% C. 0.06% D. 600%
Mathematics
Solve the application problem.The net income y (in millions of dollars) of Pet Products Unlimited from 1997 to 1999 is given by the equation 
where x represents the number of years after 1997. Assume this trend continues and predict the year in which Pet Products Unlimited's net income will be $748 million.
A. 2005 B. 2004 C. 2007 D. 2006
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 22
B. 
C. 
D. 22
Mathematics