Complete the square and then use the shifting technique to graph the function.f(x) = x2 + 2x
A.
B.
C.
D.
Answer: D
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Write the system
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as a matrix equation AX = B, where A is the coefficient matrix of the system, X is a column matrix of variables, and B is the column matrix of constants. Multiply each side of the equation on the left by the matrix inverse of A to obtain an equivalent system of equations and solve it.
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A.
B. ?
C. ?
D. ?
E. ?
Evaluate the expression or indicate that the root is not a real number.
A.
B. 16
C. 2
D. Not a real number
Use a graphing calculator to solve the system. Round to the nearest thousandth.x -y = 7100x + y = 9
A. {(0.157, -6.686)} B. {(0.020, 6.971)} C. {(0.158, -6.777)} D. {(0.154, -6.444)}
Solve the problem.A statistician has readings that take minute each to read and record. How many readings can be completed in 36 minutes?
A. 12 readings B. 14 readings C. 24 readings D. 54 readings