Solve the inequality. Write the solution set in interval notation.x2 - 4x - 12 ? 0
A. [6, ?)
B. (-?, -2]
C. (-?, -2] ? [6, ?)
D. [-2, 6]
Answer: D
Mathematics
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Perform the addition visually using symbols.-3 + (7)
A. -4 B. 4 C. -10 D. 10
Mathematics
Solve the equation. Find all real solutions.2x-2 + 5x-1 = 12
A. 4, 
B. -4, 
C. - 
, 
D. - 
, 
Mathematics
Solve the equation.
x = 
A. 4
B. -4
C. 
D. - 
Mathematics
Solve.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 7 hours and uses 140 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 4 hours.
A. 80 gallons B. 100 gallons C. 245 gallons D. 5 gallons
Mathematics