Simplify, if possible, by combining like terms.-2b2 - 5b2 + 5b2
A. -7b2 + 5
B. -2b2
C. -2b6
D. -7b4 + 5b2
Answer: B
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Provide an appropriate response. Use a table of solutions to graph the quadratic equation:y = -2x2
A. 
B. 
C. 
D. 
A combination lock will open when the right choice of three numbers (from 1 to 35) is selected. How many different lock combinations are possible (duplicate numbers are allowed)?
a. 1,225 b. 42,875 c. 128,625 d. 105
Solve the problem.A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 miles per hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answer rounded to two decimal places, if necessary.
A. 16.58 mph B. 15 mph C. 18.03 mph D. 6 mph
Find all specified roots.Fifth roots of 1.
A. 1, cis 
, cis 
, cis 
, cis 
B. 1, cis 
, cis 
, cis 
, cis 
C. 1, cis 
, cis 
, cis 
,-1
D. -1, cis 
, cis 
, cis 
, cis 