Evaluate the expression.6-1 + 8-1
A. - 
B. 
C. 2
D. 
Answer: B
Mathematics
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Find all the first order partial derivatives for the following function.f(x, y) = 
A. 
= - 
; 
= - 
B. 
= - 
; 
= - 
C. 
= - 
; 
= - 
D. 
= 
; 
= 
Mathematics
Solve the system using substitution.
A. (4, 7) B. all ordered pairs that solve y = 2x - 1 C. (7, 4) D. no solution
Mathematics
Write the standard equation for the circle.
A. (x + 1)2 + y2 = 25 B. x2 + (y + 1)2 = 25 C. x2 + (y + 1)2 = 5 D. x2 + (y - 1)2 = 25
Mathematics
Find the vertex, focus, and directrix of the parabola. Graph the equation.x2 - 10x = 4y - 49
A. vertex: (5, 6)
focus: (4, 6)
directrix: x = 6
B. vertex: (5, 6)
focus: (5, 5)
directrix: y = 7
C. vertex: (5, 6)
focus: (6, 6)
directrix: x = 4
D. vertex: (5, 6)
focus: (5, 7)
directrix: y = 5
Mathematics