Solve the problem.A railroad bridge is built over a V-shaped canyon. If the supports are 10 feet long at each end, the center support is 250 feet long, and the supports increase in length by 2 feet with each support (from 10 feet to 250 feet), what is the total length of all the supports?
A. 31,208 ft
B. 31,210 ft
C. 31,212 ft
D. 31,200 ft
Answer: B
Mathematics
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A. 3a2b + 17ab - 12 B. 3a2b + 17ab + 12 C. 3a2b - 17ab + 12 D. 13a2b - 17ab + 12
Mathematics
Find the first term and the common ratio of the geometric sequence.1, 
, 3, 3
, . . .
A. a1 = 1, r = 3
B. a1 = 
, r = 3
C. a1 = 
, r = 
D. a1 = 1, r = 
Mathematics
Solve the exponential equation using the method of "relating the bases" by first rewriting the equation in the form 
3(1 + 2x) = 243
A. {-2} B. {81} C. {6} D. {2}
Mathematics
Factor.-125a2 - 50a - 5
A. (5a + 1)(-25a - 5) B. -5(5a - 1)(5a - 1) C. (-25a - 5)(5a + 1) D. -5(5a + 1)(5a + 1)
Mathematics