Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. 
C. 
D. 
Answer: C
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Let x represent one number and let y represent the other number. Use the given conditions to write a system of equations. Solve the system and find the numbers.One number is 1 less than a second number. Twice the second number is 19 less than 5 times the first. Find the two numbers.
A. 6 and 7 B. -8 and -7 C. 8 and 9 D. 7 and 8
Provide an appropriate response.Using the law of sines, find b if a = 27, A = 55° and B = 72° in triangle ABC. Round to four significant digits.
A. 23.26 B. 31.35 C. 0.5271 D. 34.66
Solve the problem.It costs $42 per hour plus a flat fee of $19 for a plumber to make a house call. What is an equation of the form 
for this situation?
A. y = 19x + 42 B. y = 19x C. y = 42x D. y = 42x + 19
Determine the slope and the y-intercept for the linear equation. Graph the line.y = - 
x + 1
A. m = 
, y-intercept: (0, 2)
B. m = 
, y-intercept: (0, 1)
C. m = - 
, y-intercept: (0, 2)
D. m = - 
, y-intercept: (0, 1)