Solve the differential equation subject to the initial condition.
- xy - x = 0; y(1) = 10
A. y = - 
+ 11e-x2
B. y = -1 + 11e(x2 -1)/2
C. y = -1 + 11e-x2
D. y = - 
+ 
ex2 - 1
Answer: B
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?Which is the correct answer in unit rate for the following?
A.
?125 miles in 
hours is equivalent to 50 miles per hour.
B.
?150 feet in 10 seconds is equivalent to 15 feet per second.
C.
?275 cm in 5 minutes is equivalent to 45 cm per minute.
D.
?A clock's minute hand moves 90 degrees in 15 minutes. It is equivalent to the minute hand moving 5 degrees per minute.
E.
?A snail travels 4.5 feet in 12 hours, which is equivalent to traveling 
feet per hour.
Evaluate the indicated function with the given information.Find cos 2x if sin x = 
(in second quadrant).
A. 
B. - 
C. - 
D. 
Write the equation of the axis of symmetry.f(x) = -2x2 + 8x - 12
A. x = -4 B. x = 2 C. x = 4 D. x = -2
Solve the problem.In a certain city, the cost of a taxi ride is computed as follows: There is a fixed charge of $2.55 as soon as you get in the taxi, to which a charge of $2.00 per mile is added. Find an equation that can be used to determine the cost, C(x), of an x-mile taxi ride, and use this equation to find the cost of a 5-mile taxi ride.
A. $12.73 B. $12.55 C. $12.43 D. $13.45