Solve the problem.A small company that makes hand-sewn leather shoes has fixed costs of $320 a day, and total costs of $1200 per day at an output of 20 pairs of shoes per day. Assume that total cost C is linearly related to output x. Find an equation of the line relating output to cost. Write the final answer in the form 
A. C = 44x + 1520
B. C = 44x + 320
C. C = 60x + 320
D. C = 60x + 1520
Answer: B
Mathematics
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Find the intervals on which the function is continuous.y = 
- 
A. (-?, -7), (-7, -3), (-3, ?) B. (-?, -10), (-10, ?) C. (-?, ?) D. (-?, -3), (-3, ?)
Mathematics
Write an equivalent expression using the distributive law.-6(3z - m)
A. -18z - 6m B. 3z + 6m C. -18z + 6m D. -18z - m
Mathematics
Evaluate the indicated trigonometric function of the acute angle ?.If ? is an acute angle of a right triangle and if csc ? = 
, then find the value of cos ?.
A. 
B. 2
C. 
D. 
Mathematics
Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 14 in. B. 221 in. C. 21 in. D. 442 in.
Mathematics