Solve the problem.If the height of a rectangular solid is held constant, the volume varies jointly with the length and the width. If the volume is 144 cubic inches when the length is 8 inches and the width is 3 inches, find the volume when the length is 7 inches and the width is 4 inches.
A. 192 in.3
B. 126 in.3
C. 140 in.3
D. 168 in.3
Answer: D
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Solve the problem.A boat can go 30 mph in still water. It takes as long to go 180 miles upstream as it does to go downstream 270 miles. How fast is the current?
A. 6 mph B. 9 mph C. 1 mph D. 5 mph
Use the order of operations agreement to simplify the given expression.
? 
A. 
B. 
C. 
D. 
Find all solutions by factoring.x2 + 5x - 14 = 0
A. {-2, 7} B. {-7, -2} C. {2, 7} D. {-7, 2}
Provide an appropriate response.Suppose that you are solving a system of three linear equations and three variables by the row echelon method and you obtain the following augmented matrix. 
What row transformation would you perform next?
A. Multiply row 1 by 
.
B. Add 12 times row 1 to 4 times row 3 to obtain a zero in the third row, second column position.
C. Add row 1 to row 2.
D. Multiply row 2 by - 
.