Solve by the substitution method.x - 4y = 26-4x - 5y = 43
A. (2, -6)
B. (26, 43)
C. (-3, -6)
D. (-2, -7)
Answer: D
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 4sec2(t)i - 6tan(t)j + 9t2k
A. v
= -12j + 
?k
B. v
= 16i - 12j + 
?k
C. v
= 16i + 12j - 
?k
D. v
= -12j - 
?k
Mathematics
Perform the indicated operation
Mathematics
Find the median for the data given.Newspapers delivered each day: 82, 46, 226, 124, 267, 233, 232
A. 173 newspapers B. 232 newspapers C. 124 newspapers D. 226 newspapers
Mathematics
Write an equation for the graph.
A. x = y + 3 B. y = 3 C. y = x + 3 D. x = 3
Mathematics