Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. (-1, 2, 1)
B. (2, 1, 6)
C. (2, -1, 4)
D. No solution
Answer: C
Mathematics
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Use the data to construct a frequency distribution.A teacher asked each of her students how many novels they had read in the previous six months. The results are shown below.
Construct a frequency distribution, letting each class have a width of one.
A. 
B. 
C. 
D. 
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus at (-5, -1), directrix y = 9
A. (y + 5)2 = -20(x - 4) B. (x + 5)2 = -20(y + 4) C. (y + 5)2 = -20(x + 4) D. (x + 5)2 = -20(y - 4)
Mathematics
Find the slope of the line.2x = -3y - 9
A. - 
B. - 
C. 
D. - 
Mathematics
Evaluate.8x
for x = 4, y = 18
A. 12 B. 32 C. 144 D. 26
Mathematics