Find the slope and the y-intercept of the equation.2x + 9y = 55

A. 4; 
B. - ; 
C. -4; 
D. ; 

Answer: B

Mathematics

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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (2 - 5t2)i  + (7t + 3)j - e-5tk

A. v(4) = 40i + 7j + 5e-20k B. v(4) = -40i + 7j + 5e-20k C. v(4) = -20i +7j + 5e-20k D. v(4) = -40i + 7j - 5e-20k

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Mathematics

Find the quadratic approximation of f at x = 0.f(x) = tan-1 4x

A. Q(x) = 4x B. Q(x) 1 + 2x2 C. Q(x) = 1 - 4x2 D. Q(x) = 1 + 4x2

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Mathematics

Multiply.(4a - 5)2

A. 4a2 + 25 B. 16a2 + 25 C. 16a2 - 40a + 25 D. 4a2 - 40a + 25

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Mathematics

Using a calculator, find the decimal approximation to the nearest thousandth. If the square root is not a real number, so state.

A. 2.236 B. 2.241 C. 5.000 D. 2.233

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Mathematics