Determine whether the equation represents direct, inverse, joint, or combined variation.y = 4x2
A. Joint
B. Direct
C. Inverse
D. Combined
Answer: B
Mathematics
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Find the focus and the directrix of the parabola.y = x2 + 14x + 50
A. Focus: 
; directrix: y = 1
B. Focus: 
; directrix: y = 
C. Focus: 
; directrix: x = 1
D. Focus: (-7, 2); directrix: y = 0
Mathematics
Find the sum of the geometric series for those x for which the series converges.
A. 
B. 
C. 
D. 
Mathematics
Simplify the complex number to its rectangular form.
2 - j8
A. 81 B. 80 C. -79 D. 79
Mathematics
Use the quadratic formula to solve the equation.x2 + 9x - 22 = 0
A. -11, 2 B. 11, 2 C. 11, -2 D. -11, 1
Mathematics