Graph the quadratic equations.y = -x2 + 4
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.Tides go up and down in a 14.8-hour period. The average depth of a certain river is 7 m and ranges from 4 to 10 m. The variation can be approximated by a sine curve. Write an equation that gives the approximate variation y, if x is the number of hours after midnight and high tide occurs at 5:00 am.
A. y = 7 sin 
B. y = 3 sin 
C. y = 3 sin 
D. y = 7 sin 
Evaluate the expression, if possible.(- 64)-2/3
A. 
B. 
C. - 16
D. - 
Solve the problem.The school bake sale sold a total of 26 plates of brownies and slices of cake and collected a total of $102.50 for the sales. They sold 12 more plates of brownies than slices of cake. How many plates of brownies and slices of cake were sold?
A. 
plates of brownies and 
slices of cake
B. 7 plates of brownies and 19 slices of cake
C. 
plates of brownies and 
slices of cake
D. 19 plates of brownies and 7 slices of cake
Use the given graph of f(x) = ax2 + bx + c to solve the specified inequality.f(x) > 0
A. all real numbers B. x > 9 C. no solution D. x = 0