Solve the problem.Janet is training for a triathlon. Yesterday she jogged for 10 miles and then cycled another 45.5 miles. Her speed while cycling was 6 miles per hour faster than while jogging. If the total time for jogging and cycling was 4.5 hours, at what rate did she cycle?
A. 16 miles per hour
B. 13 miles per hour
C. 14 miles per hour
D. 12 miles per hour
Answer: C
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Solve by the substitution method.x - 3y = 8x = 4y
A. {( 8 ,32)}
B. {( -32 , -8)}
C. 
D. {( 32 , 8)}
Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 88% of the isotope left?
A. 639 years B. 600 years C. 241 years D. 1200 years
Solve.Given log 2 = 0.3010 and log 3 = 0.4771, evaluate log12.
A. 0.5677 B. 0.2872 C. 1.0791 D. 1.2552
Use the figure to answer True or False to the following problems
1. If m?1 = 80°, then m?GBD = 80°
2. ?3 and ?DCF are supplementary
3. If m?3 = 35°, then m?ECF = 35°
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4. D is on EC
5. BC + CE = BE
6. C is the vertex of ?3
7. If in the figure above, DE = 5 and CE = 2, find DC.