Solve the system using the addition method. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.9x - 7y = 927x - 21y = 18
A. (9, 18)
B. (3, 2)
C. 
D. Inconsistent, ?
Answer: D
Mathematics
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Find an equation for the tangent to the curve at the given point.y = x - x2, (-2, -6)
A. y = -3x + 4 B. y = -3x - 4 C. y = 5x + 4 D. y = -5x + 4
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Write the given number in scientific notation.721
A. 7.21 × 103 B. 7.21 × 101 C. 7.21 × 10-2 D. 7.21 × 102
Mathematics
Solve.In an electrical circuit, let V represent the electromagnetic force in volts at t seconds. Assume 
. Find the smallest positive value of t where 
for 
.
A. 
sec
B. 
sec
C. 0 sec
D. 
sec
Mathematics
Provide an appropriate response.True or false? i3 = -i
A. True B. False
Mathematics