Solve the problem.Vehicles in accidents often leave skid marks. To determine how fast a vehicle was traveling, officials often use a test vehicle to compare skid marks on the same section of road. If a vehicle involved in a crash left skid marks that are D feet long and a test vehicle traveling at v miles per hour leaves skid marks that are d feet long, then the speed of the vehicle in the crash is given by 
Determine V if v = 50 miles per hour, D = 289 feet, and d = 100 feet.
A. 80 miles per hour
B. 85 miles per hour
C. 170 miles per hour
D. 95 miles per hour
Answer: B
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Divide, if possible. Write the answer in simplest form.
÷ 
A. 0
B. 
C. 
D. 
Solve the problem.Assume that the elevation E, in feet, of a sag in a proposed route is given by 
where x represents the horizontal distance in feet along the proposed route and 0 ? x ? 5000. For what x-values is the elevation 1100 feet or more? Round your answer to the nearest foot.
A. x < 937 ft or x > 5483 ft B. x < 947 ft or x > 5483 ft C. x < 947 ft or x > 5473 ft D. x < 937 ft or x > 5473 ft
Solve the problem.To convert a Fahrenheit temperature to a Celsius temperature, we subtract 32 from the Fahrenheit temperature and then multiply the result by 
. The average temperature on a planet in a solar system is 50°F. What is this temperature in degrees Celsius?
A. 14°C B. -4.2°C C. 10°C D. 122°C
Solve the system of equations using the substitution method.
A. (0.33, 3) B. (3.3, 1.3) C. (3.3, .3) D. (4.3, .3)