Solve the equation and check.
A. x = 11
B. x = 10
C. x = 7
D. x = 8
E. x = -6
Answer: B
Mathematics
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Solve the system by substitution.x2 + y2 = 5x + y = 3
A. (-2, 1), (-1, 2) B. (2, 1), (1, 2) C. (-2, -1), (-1, -2) D. (2, -1), (1, -2)
Mathematics
Solve.
x2 + 7x + 40 = 0
A. 8, -20 B. -8, -20 C. 8, 20 D. -8, 20
Mathematics
Find the vertex of the parabola.f(x) = -2x2 + 7x + 3
A. 
B. 
C. 
D. 
Mathematics
Find an expression for the nth term of the arithmetic sequence.10, 15, 20, 25, 30, . . .
A. an = 5n + 5 B. an = 10n C. an = 5n + 10 D. an = n + 5n
Mathematics