Let U = {q, r, s, t, u, v, w, x, y, z}, A = {q, s, u, w, y}, B = {q, s, y, z}, and C = {v, w, x, y, z}. Find the indicated set.A ? 
A. {t, v, x}
B. {u, w}
C. {q, s, t, u, v, w, x, y}
D. {r, s, t, u, v, w, x, z}
Answer: B
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Add or subtract as indicated. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
Decide whether the problem is an equation or an expression.x + y = 4
A. Equation B. Expression
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 5x + 4y = 86x - 3y = 33
A. (-3, 4) B. (3, -4) C. (-4, 3) D. (4, -3)
Solve the problem.Suppose that an open box is to be made from a square sheet of cardboard by cutting out 
squares from each corner as shown and then folding along the dotted lines. If the box is to have a volume of 384 cubic inches, find the original dimensions of the sheet of cardboard. 
A. 20 in. by 20 in.
B. 8
in. by 8
in.
C. 8 in. by 8 in.
D. 2
in. by 4
in.