Find the speed of a particle with the given position function.
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Mathematics
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Find the value of the variable that satisfies the equation.
x - 4 = 1
A. x = 30 B. x = -30 C. x = -18 D. x = 18
Mathematics
Perform the requested operation on the given function.f(x) = -4x2 + 7x - 8, g(x) = 5x + 9Find (f + g)(-2).
A. -36 B. -9 C. -39 D. -7
Mathematics
Solve the problem.How long will it take for the population of a certain country to double if its annual growth rate is 
? Round to the nearest year.
A. 77 yr B. 12 yr C. 1 yr D. 27 yr
Mathematics
Solve the problem.Two pulleys of diameter 9 meters and 3 meters are connected by a belt. The larger pulley rotates 42 times per minute. Find the angular speed of the smaller pulley.
A. 126? radians per min B. 378? radians per min C. 252? radians per min D. 189? radians per min
Mathematics