Solve the problem.Shaundra has $7.35 to make a long distance call at a pay phone.The rates listed on the phone for a long distance call are $1.40 for the first three minutes and $0.35 for each additional minute or portion of a minute. Find the maximum number of minutes Shaundra can stay on the line.
A. 5 minutes
B. 21 minutes
C. 17 minutes
D. 20 minutes
Answer: D
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Find all the second order partial derivatives of the given function.f(x, y) = tan-1 (-3x + 4y)
A. fxx(x, y) = 
;
fyy(x, y) = 
;
fxy(x, y) = fyx(x, y) = 
B. fxx(x, y) = 
;
fyy(x, y) = 
;
fxy(x, y) = fyx(x, y) = 
C. fxx(x, y) = 
;
fyy(x, y) = 
;
fxy(x, y) = fyx(x, y) = 
D. fxx(x, y) = 
;
fyy(x, y) = 
;
fxy(x, y) = fyx(x, y) = 
Graph the inequality.y ? x - 2
A. 
B. 
C. 
D. 
Solve the proportion two different ways. First in decimal form, then in fraction form. Write your answer in lowest terms.
= 
A. x = 0.06 or x = 
B. x = 0.42 or x = 
C. x = 0.00077143 or x = 
D. x = 4.2 or x = 4
Provide an appropriate response.Explain why a different slack variable must be used for each constraint when converting constraints to linear equations.
What will be an ideal response?