Solve the problem.A cross-country skier reaches the 10-km mark of a race 40 min after reaching the 
mark. Find the speed (average rate of change) of the skier.
A. 7 km/hr
B. 
km/hr
C. 
km/hr
D. 15 km/hr
Answer: C
Mathematics
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Add or subtract as indicated.25
- 8
A. 34
B. 33
C. 17
D. 17
Mathematics
Determine the slope and the y-intercept and write the equation of the line in slope-intercept form.
A. y = - 
x - 3
B. y = -5x - 5
C. y = - 
x - 5
D. y = -x - 3
Mathematics
Solve the problem.By switching service providers, a family's telephone bill decreased from about $50 a month to about $45. What was the percent of decrease?
A. 5% decrease B. 11.1% decrease C. 10% decrease D. 11% decrease
Mathematics
Evaluate.If f(x) = x3 and g(x) = x + 2, evaluate 
(-2).
A. Undefined B. 0 C. 1 D. -8
Mathematics