Factor completely. If the polynomial cannot be factored, say it is prime.x2 - x - 45
A. prime
B. (x + 5)(x - 9)
C. (x - 45)(x + 1)
D. (x - 5)(x + 9)
Answer: A
Mathematics
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Perform the indicated operations.5
+ 16
A. -11
B. 21
C. 12
D. -22
Mathematics
Solve the equation.
= 1 - 
A. 0, -5 B. No solution C. 1, 5 D. 0, 7
Mathematics
Solve the problem.If a rock falls from a height of 20 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 20 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 2.02 sec B. 4.08 sec C. 0.83 sec D. 0.91 sec
Mathematics
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. - 
B. -1
C. 
D. 1
Mathematics