Find the vertex of the parabola.y = x2 + 6x
A. (3, 9)
B. (-3, -9)
C. (-3, 9)
D. (-3, 0)
Answer: B
Mathematics
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Provide an appropriate response.
The intensity of an earthquake is measured on the Richter scale by the formula Richter scale rating = log 
, where I0 is the measure of the intensity of a very small earthquake. Use this formula to find the Richter scale rating of an earthquake having intensity 10,000,000I0.
A. 15 B. 6 C. 7 D. 16
Mathematics
Find a rational number and an irrational number between the given pair of numbers. ? ?4.5 and 4.6 ?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Introduce slack variables as necessary, and write the initial simplex tableau for the problem.Find x1 ? 0 and x2 ? 0 such that x1 + x2 ? 543x1 + x2 ? 198and z = 2x1 + x2 is maximized. 
A. 
B. 
C. 
D. 
Mathematics
Simplify.
? 
A. -26 B. -25 C. -13 D. 28
Mathematics