Solve.
x = 
- 
A. - 
B. 
C. 
D. - 
Answer: C
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Solve the problem.How many ways can a class president, a class secretary, and a class treasurer be chosen from a group of 5 candidates?
A. 15 B. 60 C. 12 D. 120
Solve.An arch in the shape of the upper half of an ellipse is used to support a bridge spanning a creek 40 feet wide. The center of the arch is 10 feet above the center of the creek. What is the height of the arch at a distance 12 feet from the center of the creek?
A. 8 feet B. 10 feet C. 3 feet D. 0.8 foot
Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes B. Yes; no C. No
Name the property illustrated.5(x + 4) = 5x + 5 ? 4
A. identity property of addition B. commutative property of addition C. distributive property D. associative property of multiplication