Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = -9x2 - 2x - 10
A. vertex 
intercept (0, -10)
B. vertex 
intercept (0, 10) 
C. vertex 
intercept (0, 10) 
D. vertex 
intercept (0, -10) 
Answer: D
Mathematics
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Tell whether the equation determines y to be a function of x.
A. no B. yes
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Find the Jacobian 
or 
(as appropriate) using the given equations.
A. -6
B. - 
C. 6
D. 
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = cos(4t)i + 5ln(t - 3)j - 
k
A. v(0) = 4i - 
j
B. v(0) = 
j
C. v(0) = -
j
D. v(0) = -4i - 
j
Mathematics
Solve the problem.Two forces F1 and F2 of 28.5 and 31.6 pounds, forming an angle of 86.0°, act at a point. Find the magnitude of the resultant force. Round the answer to one decimal place, if necessary.
A. 60.1 lb B. 41.1 lb C. 44.0 lb D. 900 lb
Mathematics