Solve the equation.
= 
A. 
B. -2, 10
C. no solution
D. 10
Answer: A
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Solve the problem using determinants.Linear systems occur in the design of roof trusses for new homes and buildings. The simplest type of roof truss is a triangle. The truss shown in the figure is used to frame roofs of small buildings. If a force of 125 pounds is applied at the peak of the truss, then the forces or weights W1 and W2 exerted parallel to each rafter of the truss are determined by the following linear system of equations. 
(W1 + W2) = 125W1 - W2 = 0Find W1 and W2.
A. W1 = 72.17 lb; W2= 62.5 lb B. W1 = -72.17 lb; W2= -72.17 lb C. W1 = 41.67 lb; W2= 41.67 lb D. W1 = 72.17 lb; W2= 72.17 lb
For an election with four candidates (A, B, C, and D) we have the following preference schedule:
The ranking of the candidates using the plurality-with-elimination method is
A. first: D; second: C; third: B; fourth: A. B. first: C; second: A; third: D; fourth: B. C. first: D; second: A; third: C; fourth: B. D. first: C; second: D; third: A; fourth: B. E. none of these
Solve the problem.The function f(x) = 
models the average cost per unit, f(x), for Electrostuff to manufacture x units of Electrogadget IV. How many units must the company produce to have an average cost per unit of $450?
A. 90 units B. 181 units C. 164 units D. 163 units
Solve the problem.Find the magnitude of the difference between a windchill factor of -50 and a windchill factor of -5.
A. -55 B. 55 C. 45 D. -45