Solve the quadratic inequality. Express your solution on a number line using interval notation.3x2 + 2x - 8 ? 0
A. (-?, -2] ? 
B. 
C. [-2, ?)
D. 
Answer: D
Mathematics
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Estimate the result of the calculation. Use your estimate to determine if the result appears to be correct or incorrect.
A. Incorrect. Estimate: 500,000 B. Correct. Estimate: 400,000 C. Incorrect. Estimate: 300,000 D. Incorrect. Estimate: 200,000
Mathematics
Simplify, if possible.
+ 5
+ 7
A. 12
B. 35
C. 35
D. 12
Mathematics
Find y ".y = 
4
A. - 
3
B. - 
2 + 
3
C. 12 
2
D. 
2 + 
3
Mathematics
Solve the problem.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height h of the object after t seconds is given by the quadratic equation 
When will the object hit the ground?
A. 2 sec B. -2 sec C. 5 sec D. 160 sec
Mathematics