Find a linear function whose graph has the given slope and y-intercept.Slope - 
, y-intercept 
A. f(x) = 
x - 
B. f(x) = - 
x + 
C. f(x) = 
x + 
D. f(x) = - 
x - 
Answer: B
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Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is 
with time measured in years.
A. 2308 years B. 1600 years C. 800 years D. 1400 years
Solve the application and answer with a complete sentence.The regular price of a ring is $851.50. During a May jewelry sale, the ring was discounted 15%. What was the new price of the ring?
A. The new price is $127.72. B. The new price is $126.73. C. The new price is $723.78. D. The new price is $722.78.
Solve using Cramer's Rule.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 124 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. Solve the system to find W1 and W2. 
(W1 + W2) = 124 W1 - W2 = 0
A. W1 = 41.33 lb; W2= 41.33 lb B. W1 = -71.59 lb; W2= -71.59 lb C. W1 = 71.59 lb; W2= 62 lb D. W1 = 71.59 lb; W2= 71.59 lb
Solve.Let f(x) = 3x + 9 and g(x) = 6x2 + 2. Find f(8) ? g(8) .
A. 12,738 B. 9216 C. 12,672 D. 9264