Solve the problem.A garage owner wants to fill a 55-gallon drum with a 20% winter mixture of antifreeze for his customers. How many gallons of 100% antifreeze should he mix with some 10% antifreeze mixture in order to fill the drum?
A. 19
gal
B. 6
gal
C. 35
gal
D. 48
gal
Answer: B
Mathematics
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Find the derivative of y with respect to x.y = tan-1 
A. 
B. 
C. 
D. 
Mathematics
Graph the system of inequalities. Find the coordinates of the vertices.3y + x ? 0,y + 2x ? 10,y ? 0
A. 
(0, 0) , (5,0)
B. 
(6, -2)
C. 
(0, 0) , (10, 0)
D. 
(0, 0) , (5, 0) , (6, -2)
Mathematics
Solve.A long-distance runner runs 4 mi. south and then 6 mi. east. How far is the runner from the starting point? 
A = 4B = 6
A. 3.6 mi. B. 26 mi. C. 7.2 mi. D. 5 mi.
Mathematics
Determine whether the pair of vectors is orthogonal.3i - 8j, -8i - 3j
A. Yes B. No
Mathematics