Solve the equation.9n - 7 = 29
A. n = 27
B. n = 4
C. n = 10
D. n = 31
Answer: B
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Solve the system.3w + 4x - 2y + z = -8-w + x + 4y - z = 154w - x + y + 4z = 5 w + x + 3y - z = 15
A. (2, -2, -4, -2) B. (-2, -1, 4, -4) C. (4, 1, 2, -4) D. (2, -1, 4, -2)
Complete the square and then use the shifting technique to graph the function.f(x) = x2 - 4x
A. 
B. 
C. 
D. 
Determine the half-life of the substance that decays from A0 to A in time t. Round to the nearest tenth of a unit. A0 = 162, A = 60, t = 17 years
A. 2.5 yrs B. 17.1 yrs C. 11.9 yrs D. 11.7 yrs
Let x represent one number and let y represent the other number. Use the given conditions to write a system of nonlinear equations. Solve the system and find the numbers.The sum of the squares of two numbers is 13. The difference of the two numbers is 5. Find the two numbers.
A. 2 and 3 or -3 and -2 B. -3 and 2 or -2 and 3 C. -3 and 2 D. -2 and 3