Solve the equation. First simplify the expression by combining like terms.-7b + 8 + 5b = -3b + 13
A. { -8 }
B. { -13 }
C. { 5 }
D. { 13 }
Answer: C
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Find the moment or center of mass of the wire, as indicated.Find the center of mass of a wire that lies along the first-quadrant portion of the circle
if the density of the wire is 
A. 
= 5?, 
= 5?
B. 
= 
?, 
= 
?
C. 
= 
?, 
= 
?
D. 
= 0, 
= 
?
Solve the problem.The table lists the average composite scores on a national entrance exam for selected years.
(i) Make a line graph of the data.(ii) If the graph represents a piecewise-linear function f, find a symbolic representation for the piece of f located on the interval 
A. 
f(x) = 0.75x - 1359.5 if 1986 ? x ? 1990
B. 
f(x) = 131.5 if 1986 ? x ? 1988
C. 
f(x) = 4.4x - 8615.7 if 1990 ? x ? 1992
D. 
f(x) = 122.7 if 1990 ? x ? 1992
Convert the credit card rate to the APR. ? Ohio, 0.02192% daily rate. ?
A. 4% B. 7% C. 6% D. 5% E. 8%
Solve the equation.2(2z - 4) = 3(z + 4)
A. z = -4 B. z = 4 C. z = 6 D. z = 20