Solve the problem.Suppose there are 3 roads connecting town A to town B and 7 roads connecting town B to town C. In how many ways can a person travel from A to C via B?
A. 9
B. 49
C. 21
D. 10
Answer: C
Mathematics
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Find the equation of the set of points P satisfying the given condition.The sum of the distances of P from (±1, 0) is 10.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the equation by completing the square.x2 = 7 - 8x
A. -1 ± 
B. -4 ± 
C. -4 ± 2
D. 4 + 
Mathematics
Write an expression for the general or nth term, an, of the arithmetic sequence.3, 7, 11, 15, . . .
A. an = 4n - 1 B. an = 4n + 3 C. an = 4(n+1) + 3 D. an = 3n + 3
Mathematics
Determine the total turn for the closed curve. Assign a positive measure to counterclockwise turning.
A. -360° B. 720° C. 0° D. 360°
Mathematics