Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.x+ 2y+ 2z= -21 2y+ 3z= -23? z= -5
A. No solution
B. (-3, -4, -5)
C. (-5, -4, -3)
D. (-3, -5, -4)
Answer: B
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After identifying entrepreneurial opportunities, entrepreneurs turn their attention to
A. analyzing the competitive environment to minimize strategic error. B. developing capabilities to create competitive advantages required to make a profit from them. C. selecting a willing partner to help them pursue the opportunity. D. identifying the next major opportunity.
Express the repeating decimal as a fraction in lowest terms.0.
A. 
B. 
C. 
D. 
Determine whether or not the function is one-to-one.
A. Yes B. No
Solve the problem.The number of dislocated electric impulses per cubic inch in a transformer when lightning strikes is given by d(x) = 7800(2)x, where x is the time in milliseconds of the lightning strike. Find the number of dislocated impulses at 
and 
A. 15,600; 249,600 B. 7800; 249,600 C. 7800; 31,200 D. 7800; 78,000