Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range.y = 2x2 - x + 5
A. D: all real numbers; R: (y ? 5.125)
B. D: all real numbers; R: (y ? 5)
C. D: (y ? -0.25), R: (y ? 4.875)
D. D: all real numbers; R: (y ? 4.875)
Answer: D
Mathematics
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Simplify. Assume that each variable is nonnegative.5 + 3
- 8
- 3
A. 24
- 15
B. -5
+ 2
C. 11
+ 2
D. 24
+ 2
Mathematics
Simplify completely.
A. x4y2 B. x5y3 C. x4y3 D. xy3
Mathematics
Solve the problem.Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $7500 in 2007 and $56,500 in 2012. Let x = 0 represent 2007. Find the equation giving yearly sales y.
A. S(x) = 49,000x + 56,500 B. S(x) = 9800x + 7500 C. S(x) = 49,000x + 7500 D. S(x) = 9800x + 56,500
Mathematics
Solve the equation.
y + 6 = 
A. 
B. - 
C. - 
D. - 
Mathematics