Use the vertex formula to find the vertex of the quadratic function.f(x) = -x2 - 8x + 4
A. (-8, 4)
B. (4, -44)
C. (-4, 20)
D. (4, -12)
Answer: C
Mathematics
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Divide.
A. 20 B. 24 C. 20 R7 D. 20 R4
Mathematics
Solve the equation for the unknown variable.log5d = 3
A. d = 243 B. d = 15 C. d = 8 D. d = 125
Mathematics
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 45.05 sin x superimposed over a scatter diagram of the data. Find the sinusoidal function of the form 
which best fits the data.
A. y = 45.05 sin 
+ 66.25
B. y = 45.05 sin 
+ 66.25
C. y = 45.05 sin 
+ 21.20
D. y = 45.05 sin 
+ 21.20
Mathematics
Use the square root property to solve the quadratic equation.x2 = 49
A. ±8 B. 24.5 C. ±7 D. 7
Mathematics