Solve each proportion for the given variable.
= 
A. 
B. 6
C. 6
D. 7
Answer: C
Mathematics
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Solve the problem.The voltage V across a semiconductor in a computer is given by V = aI + bI2, where I is the current (in amperes). If a 9-volt battery is connected across the semiconductor, find the current if a = 6 and b = 3.
A. I = 3 amperes B. I = 1 ampere C. I = -3 amperes D. Not enough information
Mathematics
Find the length and direction (when defined) of u × v.u = - 
i + 
j + k, v = i + j + 2k
A. 8; 
i - 
j + 
k
B. 8; 
i - 
j - 
k
C. 2
; - 
i + 
j - 
k
D. 2
; 
i + 
j - 
k
Mathematics
Decide whether or not the ordered pair is a solution to the equation.8x + 15y = -9; (-3, 1)
A. Yes B. No
Mathematics
Find an equation of variation for the given situation.y varies inversely as x and y = 36 when x = 
A. y = 
B. y = 
C. y = 
D. y = 
Mathematics