Solve by using the quadratic formula.n(4 - 4n) = 4
A. 
B. 1
C. 0
D. no real-number solutions
Answer: D
Mathematics
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Write the phrase as a mathematical expression. Use x as the variable.Some number minus 51
A. 51 B. 51x C. x + 51 D. x - 51
Mathematics
Find an equation of the parabola described.Directrix the line y = 3; vertex at (0, 0)
A. x = 3y2
B. y = - 
x2
C. y = -12x2
D. x = - 
y2
Mathematics
Solve the inequality and give the solution in interval notation.
? 
+ 
A. [14, ?) B. (14, ?) C. (-?, 14) D. (-?, 14]
Mathematics
Solve the percent of change problem.Brand X copier advertises that its copiers run 20% longer between service calls than its competitor. If Brand X copiers run 31,100 copies between service calls, how many copies would the competitor run? Round to the nearest copy.
A. 37,320 copies B. 25,917 copies C. 24,880 copies D. 17,278 copies
Mathematics