Evaluate the sum.
A. 131
B. 135
C. 119
D. 123
Answer: B
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Solve the equation.2x + 1 = 16
A. -1 B. -3 C. 4 D. 3
Solve.An investment is worth $3600 in 1994. By 1999 it has grown to $5615. Let y be the value of the investment in the year x, where x = 0 represents 1994. Write a linear equation that relates the value of the investment, y, to the year x.
A. y = -403x + 7630
B. y = 
x + 3600
C. y = -403x + 3600
D. y = 403x + 3600
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination. x - y + 4z = 155x + z = 3 x + 3y + z = -6
A. (3, 0, -3) B. (3, -3, 0) C. (0, -3, 3) D. No solution
Solve the problem.The number of bacteria growing in an incubation culture increases with time according to B = 5000(5)x, where x is time in days. Find the number of bacteria when x = 0 and x = 2.
A. 5000 bacteria, 125,000 bacteria B. 25,000 bacteria, 125,000 bacteria C. 5000 bacteria, 15,625,000 bacteria D. 5000 bacteria, 50,000 bacteria