Solve the problem by writing and using a system of linear equations.Two bikers start at opposite ends of a trail and bike toward each other. The trail is 144 miles long and they meet in 4 hours. If one biker is twice as fast as the other, find both biking speeds.
A. 10 mph, 20 mph
B. 4 mph, 8 mph
C. 72 mph, 144 mph
D. 12 mph, 24 mph
Answer: D
Mathematics
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Solve the problem.Does the graph of the function y = tan x - x have any horizontal tangents in the interval 
If so, where?
A. Yes, at x = 
, x = 
B. Yes, at x = ?
C. No
D. Yes, at x = 0, x = ?, x = 2?
Mathematics
Divide.
A. 229 B. 22.9 C. 21.9 D. 219
Mathematics
Solve.A new piece of equipment cost a company $67,000. Each year, for tax purposes, the company depreciates the value by 25%.What value should the company give the equipment after 7 years?
A. $8943 B. $4 C. $16 D. $11,925
Mathematics
Write the expression with positive exponents only. Then simplify, if possible.9-1 + 4-1
A. 
B. 
C. 
D. 2
Mathematics