Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. 
Answer: D
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Solve.Find the equation of the line tangent to the curve of 
at 
A. 12
x + 6y + 3 - 2?
= 0
B. 12
x + 6y - 6
- ? = 0
C. -6
x + 12y + 6 + ?
= 0
D. -12x + 6y - 3
+ 2? = 0
Solve the problem.A vendor sells hot dogs and bags of potato chips. A customer buys 3 hot dogs and 3 bags of potato chips for $8.25. Another customer buys 2 hot dogs and 3 bags of potato chips for $6.50. Find the cost of each item.
A. $2.00 for a hot dog; $1.25 for a bag of potato chips B. $1.75 for a hot dog; $1.25 for a bag of potato chips C. $1.00 for a hot dog; $1.75 for a bag of potato chips D. $1.75 for a hot dog; $1.00 for a bag of potato chips
Find the quantity if v = 5i - 7j and w = 3i + 2j.
- 
A. 
B. 
- 
C. 2
- 
D. 
Solve the problem.A square plywood platform has a perimeter which is 7 times the length of a side, decreased by 18. Find the length of a side. 
A. 1 B. 9 C. 6 D. 3