Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the variables. Then use back-substitution to find the solution.
A. {(
, -8, 4)}
B. {(
, -6, 4)}
C. {(- 3, - 
, 3)}
D. {(- 
, -6, 4)}
Answer: B
Mathematics
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Multiply and simplify. Leave your answer in exponential notation.x2 ? x0
A. 0 B. 2x2 C. x2 D. x0
Mathematics
Solve.Approximate to the nearest hundredth the volume of a sphere with diameter of 9.5 meters. Use 3.14 for ?.
A. 283.39 cu m B. 47.23 cu m C. 2692.16 cu m D. 448.69 cu m
Mathematics
The graph shows the total sales in thousand of dollars from the distribution of x thousand catalogs. Find the average rate of change of sales with respect to the number of catalogs distributed for the change in x.
30 to 50
A. 
B. 2
C. 
D. 1
Mathematics
Solve the equation.
= 2x
A. -5 B. 1 C. 5 D. No solution
Mathematics