Multiply.(3 - 8r)(3 + 8r)
A. 9 - 48r - 64r2
B. 9 - 64r2
C. 9 - 8r2
D. 9 + 48r - 64r2
Answer: B
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Divide.
A. x2 + 3x + 3 + 
B. x2 + 3x + 3
C. x2 - 3x + 3 + 
D. x2 - 3x + 3
Solve the system by the substitution method or the addition method.
A. 
B. (5, -2)
C. (3, -5)
D. (-4, 10)
Given 
, find ?f / ?y
What will be an ideal response?
Solve the problem using the vector form v = 
[(cos ?)i + (sin ?)j].A weight of 500 lb is supported by a frame made of two rods and hinged at points A, B, and C. Find the forces exerted by the two rods rounded to the nearest pound. 
A. Horizontal rod: 10-lb tension; other rod: 483 -lb compression B. Horizontal rod: 720 -lb tension; other rod: 518-lb compression C. Horizontal rod: 518-lb tension; other rod: 720-lb compression D. Horizontal rod: 483-lb tension; other rod: 695-lb compression