Use the substitution method to solve the system.x + y = -1x + y = 5
A. (-1, 5)
B. (0, 0)
C. (0, 4)
D. No solution
Answer: D
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Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 8 feet from the source is given by the function: P(t) = 
cos (2n? - ct) , where n is a positive integer. Use the difference identity for cosine to simplify P in this situation.
A. P(t) = 
cos (ct)
B. P(t) = 
cos (ct + 8)
C. P(t) = 
cos (ct) - 
sin (ct)
D. P(t) = cos (ct)
Add or subtract as indicated. Simplify, if necessary.- 
+ 
A. - 
B. 
C. 
D. - 
Provide an appropriate response.For f(t) = 3 - 5t, find 
.
Fill in the blank(s) with the appropriate word(s).
Find an equation for the line with the given properties.Perpendicular to the line y = -9; containing the point (5, 4)
A. y = 5 B. y = 4 C. x = 5 D. x = 4