Simplify the expression.3x + x
A. 4x
B. 3x
C. 7x
D. 3x + 1
Answer: A
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds). s (m)
When is the body moving forward?
A. 0 < t < 1, 3 < t < 4, 5 < t < 7, 9 < t < 10 B. 0 < t < 1, 3 < t < 4, 5 < t < 7 C. 0 < t < 8 D. 0 < t < 3, 3 < t < 5, 5 < t < 8
Mathematics
Solve the rational inequality.
< 0
A. (-?, -8) ? (7, ?) B. (-8, 7) C. (7, ?) D. (-?, -8)
Mathematics
E ( X )
The probability density function of X is f (x) = 5 x6 over [1, ?)
Mathematics
Solve. Remember to insert units when writing your answer.A floor tile is 40.72 cm wide. How many tiles in a row are needed to cross a room 14.252 m wide?40.72 cm
14.252 m
A. 3.5 tiles B. 35 tiles C. 3500 tiles D. 350 tiles
Mathematics