Add or subtract as indicated.(11x2y2 - 9y4) + (-4x2y2 - 6y4)
A. 7x4y4 - 15y8
B. 7x2y2 + 15y4
C. 7x2y2 - 15y4
D. -44x4y4 + 54y8
Answer: C
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Simplify.30 + 21 ? 28
A. 658 B. 1428 C. 618 D. 79
Solve.How many real solutions are possible for a system of equations whose graphs are a parabola and a hyperbola?
A. 1, 2, or 3 real solutions B. 0, 1, 2, 3, or 4 real solutions C. 0, 1, 2, or 3 real solutions D. 1, 2, 3, or 4 real solutions
Translate the phrase to an algebraic expression.ten more than x
A. 10x B. x - 10 C. x + 10 D. 10
Solve the problem.A radio station emits a signal that can be received within a 30 mile radius of the station's location. Another radio station located 70 miles east emits a signal that can be received within a 60 mile radius of the station's location. The system of inequalities x2 + y2 ? 900 (x - 70)2 + y2 ? 3600can be used to determine the region in which both radio station signals can be received. Graph this system. 
A. 
B. 
C. 
D. 