Solve the equation.
= x + 6
A. {-4}
B. {4, 5}
C. {4}
D. {4, -4}
Answer: C
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Solve the system using the graphing method. 3x + 3y = 10-15x - 15y = 10 
A. {(-5, -10)}
B. {(5, 10)}
C. {(1, 1)}
D. ?
Rewrite the quadratic equation in the form ax2 + bx + c = 0, then identify a, b, and c. 3x2 = 12x - 12
A. a = 3, b = -12, c = 12 B. a = 3, b = 12, c = 12 C. a = 3, b = 12, c = -12 D. a = 3, b = -12, c = -12
Solve the problem. Round your answer to two decimal places.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 40 seconds are required to make a 5-by-4 enlargement, find the time required for a 6-by-5 enlargement.
A. 30 sec B. 60 sec C. 90 sec D. 120 sec
Multiply and then, if possible, simplify by factoring.
A. 256
B. 16
C. 4
D. 4