Solve the equation using the quadratic formula.4x2 = -6x - 1
A. 
B. 
C. 
D. 
Answer: C
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Find the exact value of the expression.tan 345°
A. 
B. 2 + 
C. -2 - 
D. 
Use a graphing calculator to solve the system by finding A-1 and A-1B. (Round to the nearest integer if necessary.)-4x + 3y - z = -12 x + 2y - 2z = 4-8x + y + z = -28
A. {(2, 2, 2)} B. {(4, -2, -2)} C. {(5, 0, 2)} D. {(4, 2, 2)}
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.-4x - 3y - z = -35 x - 6y + 6z = -28-8x + y + z = -5
A. (-2, 8, 4) B. (2, 3, 8) C. (2, 8, 3) D. No solution
Solve the problem.The following graph shows the private, public and total national school enrollment for students for select years from 1970 through 2000.
i) How is the graph for total school enrollment, T, determined from the graph of the private enrollment, r, and the public enrollment, u?ii) During which 10-year period did the total number of students enrolled increase the least?iii) During which 10-year period did the total number of students enrolled increase the most?
A.
| i) | T is the sum of r and u. |
iii) 1970-1980
B.
| i) | T is the sum of r and u. |
iii) 1980-1990
C.
| i) | T is the difference of r and u. |
iii) 1990-2000
D.
| i) | T is the sum of r and u. |
iii) 1990-2000