Find the product of the two binomials.(-5x + 7y)(-3x - 8y)
A. 15x2 - 21xy - 56y2
B. 15x2 + 40xy - 56y2
C. 15x2 + 19xy + 19y2
D. 15x2 + 19xy - 56y2
Answer: D
Mathematics
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We locate the position of a car driving on an east-west highway as distance east. If the car is driving west at a speed of 60 miles per hour, what can be said about velocity?
A. Velocity is 60 miles per hour. B. Velocity is -60 miles per hour. C. Velocity is 0 miles per hour. D. None of the above.
Mathematics
Express the set using the roster method. {x | x ? N and x is greater than 9}
A. {10,11,12,...} B. {10,12,14,...} C. {9,10,11,...} D. {10,11,12}
Mathematics
Find the mean.75, 87, 59, 83, 56
A. 60 B. 72 C. 75 D. 87
Mathematics
Find the sum of the sequence.
A. -21 B. -5 C. -30 D. -6
Mathematics