Solve the system of equations.x+ y=0-5x - 5y + 5z =-15x- z=2
A. (-3, -1, 1)
B. (-1, -3, 1)
C. (-3, 1, -1)
D. (-1, 1, -3)
Answer: D
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Solve the problem.The positions of two particles on the s-axis are s1 = sin t and 
with s1 and s2 in meters and t in seconds.At what time(s) in the interval 0 ? t ? 2? do the particles meet?
A. t = ? sec and t = 2? sec
B. t = 
? sec and t = 
? sec
C. t = 
? sec and t = 
? sec
D. t = 
? sec and t = 
? sec
Write a logistic equation with the given parameter values. Then solve the initial value problem and graph the solution. Let r be the natural growth rate, K the carrying capacity, and P0 the initial population.r = 0.2, K = 1980, P0 = 90
A. P' = 0.2P
; P = - 
B. P' = 0.2P
; P = 
C. P' = -0.2P
; P = 
D. P' = 0.2P
; P = 
Find the unit ratio.40 to 30
A. 0.25
B. 1.
C. 0.75
D. 7.5
Give the complement and the supplement of angle z. ?
A. Complement: 90° - z Supplement: 90° + z B. Complement: 180° - z Supplement: 90° - z C. Complement: 90° - z Supplement: 180° - z D. Complement: -z Supplement: 180° - z E. Complement: 90° + z Supplement: 90° - z