Use the discriminant to determine the number of real roots the equation has.
3x² + 2x + 1 =0
A) One real root (a double root)
B) Two distinct real roots
C) Three real roots
D) None (two imaginary roots)
D) None (two imaginary roots)
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Evaluate the expression using the given value of the variables.7x-1y2 for x = -1, y = 2
A. -28
B. - 28
C. - 
D. - 
Solve.|5 - x| = 2
A. {3, -7} B. {3} C. {7} D. {3, 7}
Solve the problem. Round to the nearest cent or tenth of a percent.What-A-Pane Inc. sells windows for $146.25 each after a markup of $57.51. Find the cost of a window and the markup as a percent of selling price.
A. Cost = $88.74 Rate of markup based on selling price = 64.8% B. Cost = $203.76 Rate of markup based on selling price = 64.8% C. Cost = $88.74 Rate of markup based on selling price = 39.3% D. Cost = $203.76 Rate of markup based on selling price = 71.8%
Express as a product.ln y72
A. y ln 72 B. ln y ? ln 72 C. ln y ? ln y D. 72 ln y