Solve and check.3(2z - 3) = 5(z + 5)
A. z = 19
B. z = 34
C. z = 16
D. z = -16
Answer: B
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Solve the problem.Find the center of mass of the rectangular solid of density 
defined by 
, 
, 
.
A. 
= 
, 
= 
, 
= 1
B. 
= 
, 
= 
, 
= 2
C. 
= 1, 
= 4, 
= 
D. 
= 
, 
= 2, 
= 
Solve the problem.A rectangular field is to be enclosed on four sides with a fence. Fencing costs $4 per foot for two opposite sides, and $2 per foot for the other two sides. Find the dimensions of the field of area 800 ft2 that would be the cheapest to enclose.
A. 56.6 ft @ $4 by 14.1 ft @ $2 B. 20 ft @ $4 by 40 ft @ $2 C. 40 ft @ $4 by 20 ft @ $2 D. 14.1 ft @ $4 by 56.6 ft @ $2
Decompose into partial fractions.
A. 
- 
B. 
- 
C. 
+ 
D. 
+ 
Solve the system of equations by the substitution method.
A. (16, -4) B. (-4, 16) C. infinite number of solutions D. no solution