Estimate the answer to the problem.A mobile library has 1029 books in its collection. If there are 21 shelves in the library, then how many books, on average, are stacked on each shelf?
A. 55
B. 60
C. 50
D. 46
Answer: C
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Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.-7x + 6y = -302x + 2y = -10
A. No solution B. (0, -5) C. (0, -4) D. (-1, -4)
First rewrite the quadratic function in standard form by completing the square, then find any x-intercepts and any y-intercepts.f(x) = 2x2 - 16x + 30
A. x-intercepts: 5 and -3; y-intercept: -30 B. x-intercepts: 5 and 3; y-intercept: 30 C. x-intercepts: 6 and -2.5; No y-intercepts D. x-intercepts: 6 and 2.5; y-intercept: 16
Graph the system of inequalities.y ? 2x - 3y ? -2x + 5x ? 5
A. 
B. 
C. 
D. 
Write the first four terms of the sequence whose general term is given.an = (-2)n
A. -2, 4, -8, 16 B. -2, -4, -8, -16 C. 2, -4, 8, -16 D. 2, -4, -8, -16