Solve.The speed of a vehicle is inversely proportional to the time it takes to travel a fixed distance. If a vehicle travels a fixed distance at 40 miles per hour in 60 minutes, how fast must it travel to cover the same distance in 30 minutes?
A. 80 miles per hour
B. 
miles per hour
C. 45 miles per hour
D. 20 miles per hour
Answer: A
Mathematics
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Choose the graph that matches the function. f(x) = 5x + 6
A. 
B. 
C. 
D. 
Mathematics
Solve the compound inequality. Write your answer in interval notation or state that there is no solution.2 - 4x ? 10 and 5x - 3 ? 17
A. (-?, -2] ? [4, ?) B. [4, ?) C. (-2, 4) D. [-2, 4]
Mathematics
Solve the equation by finding an expression for the determinant on the left, and then solving using the appropriate method.
= 4
A. {-2} B. {5} C. {2} D. ?
Mathematics
Perform the indicated operations. Assume that all variables represent positive numbers.
(
+ 
)
A. 35 + 5
B. 70
C. 1225 + 5
D. 35 + 25
Mathematics