Perform the indicated operation or operations.
- 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.A building has an entry with the shape of a parabolic arch 50 feet high and 8 feet wide at the base. Find an equation for the parabola if the vertex is placed at the origin of the coordinate system.
A. x2 = -1.3y B. y2 = -1.3x C. y2 = -0.3x D. x2 = -0.3y
Evaluate the discriminant for the equation. Then use it to predict the number of distinct solutions, and whether they are rational, irrational, or nonreal complex.16x2 + 8x + 1 = 0
A. Two distinct rational solutions B. Two distinct irrational solutions C. One rational solution (a double solution) D. Two distinct nonreal complex solutions
Solve the problem by using two equations with two variables.On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $6 each and a number of necklaces at $15 each. She wrote a check for $1080 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?
A. 90 bracelets and 30 necklaces B. 80 bracelets and 40 necklaces C. 85 bracelets and 35 necklaces D. 75 bracelets and 45 necklaces
Solve the radical equation.
= 7
A. {-4} B. ? C. {-4, 4} D. {0, -4}