Solve the equation by factoring.7x2 - 9x = 0
A. {0}
B. 
C. 
D. 
Answer: C
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (3 ln(8t))i + (2t3)j
A. a = - 
i + 12tj
B. a = 
t-2i + 12tj
C. a = 
i + 6tj
D. a = - 
t-2i + 12tj
Find the magnitude 
and direction angle ?, to the nearest tenth of a degree, for the given vector v. v = -5i + 12j
A. 13; 67.4° B. 13; 112.6° C. 15; 112.6° D. 13; 157.4°
Solve the problem.The length of a rectangular storage room is 5 feet longer than its width. If the area of the room is 84 square feet, find its dimensions.
A. 6 feet by 13 feet B. 8 feet by 13 feet C. 6 feet by 11 feet D. 7 feet by 12 feet
Factor by grouping.15x4 + 10x2 - 6x2 - 4
A. (15x2 + 2)(x2 - 2) B. (5x2 + 2)(3x2 - 2) C. (5x4 - 2)(3x + 2) D. (5x2 - 2)(3x2 + 2)