Simplify the expression. Assume that all variables are positive when they appear.
- 
+ 
A. 4x
- 6
B. 5x
- 6
C. 5x
- 6
D. 5
- 
Answer: B
Mathematics
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Convert the units.619 g = 
mg
A. 0.619 mg B. 0.0619 mg C. 61,900 mg D. 619,000 mg
Mathematics
Express the number in scientific notation.0.0000004
A. 4 × 10-6 B. 4 × 10-8 C. 4 × 10-7 D. 4 × 10-9
Mathematics
Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive.
A. 7
B. 6
C. 61
D. 5
Mathematics
State the dual problem. Use y1, y2, and y3 as the variables. Given: y1 ? 0, y2 ? 0, and y3
Minimizew = 2x1 + 3x2 + x3subject to:x1 + 3x2 + 2x3 ? 41 2x1 + 4x2 + 3x3 ? 57 x1 ? 0, x2 ? 0, x3 ? 0
A.
| Maximize | z = 41y1 + 57y2 |
| subject to: | y1 + 2y2 ? 2 |
2y1 + 3y2 ? 1
B. Maximize z = 57y1 + 41y2
| subject to: | 2y1 + y2 ? 2 |
3y1 + 2y2 ? 1
C. Maximize z = 57y1 + 41y2
| subject to: | 2y1 + y2 ? 2 |
3y1 + 2y2 ? 1
D.
| Maximize | z = 41y1 + 57y2 |
| subject to: | y1 + 2y2 ? 2 |
2y1 + 3y2 ? 1
Mathematics