Solve.7p = 8(6p + 5)
A. 
B. 
C. - 
D. 
Answer: C
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Solve the problem.If two sound sources at the same volume are equidistant from a microphone, the pressure on the microphone is given by p = a cos ?1t + a cos ?2twhere a, ?1, ?2 are constants and t is time. Write p as a product of cosine functions.
What will be an ideal response?
Find the domain of the function.f(x) = x2 + 4
A. (-?, -4) ? (-4, ?) B. (-?, ?) C. (-4, ?) D. [-4, ?)
Find the zeros of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = -x2(x + 8)(x2 - 1)
A. x = 0, touches the x-axis and turns around; x = 8, crosses the x-axis; x = -1, touches the x-axis and turns around; x = 1, touches the x-axis and turns around B. x = 0, touches the x-axis and turns around; x = -8, crosses the x-axis; x = 1, touches the x-axis and turns around C. x = 0, touches the x-axis and turns around; x = -8, crosses the x-axis; x = -1, crosses the x-axis; x = 1, crosses the x-axis D. x = 0, crosses the x-axis; x = -8, crosses the x-axis; x = -1, crosses the x-axis; x = 1, crosses the x-axis
Use Cramer's rule to solve the linear system.
A. x = - 
, y = 
B. x = 
, y = - 
C. x = 
, y = 
D. x = 
, y = - 