Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y varies directly with x. When x = 3.5, then y = 0.7.
A. k = 0.2; y = 0.2x
B. k = 0.7; y = x - 2.8
C. k = 0.7; y = 0.7x
D. k = 5; y = 5x
Answer: A
Mathematics
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A. 
?
B. 
?
C. 
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D. 
?
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Solve the inequality and write the solution set using interval notation; then graph the solution set on a number line. (a + 1)(a - 6)(a - 7) > 0
A. (7, ?)
B. (-1, 6) ? (7, ?)
C. (-?, -1) ? (6, 7)
D. (-?, 6)
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Solve the right triangle shown in the figure. Round lengths to one decimal place and express angles to the nearest tenth of a degree. 
A = 36°, b = 51.2
A. B = 36°, a = 70.5, c = 41.4 B. B = 54°, a = 37.2, c = 63.3 C. B = 36°, a = 41.4, c = 37.2 D. B = 54°, a = 70.5, c = 87.1
Mathematics
Given  figure 1.png)
, solve 2X - A = 3B, for X.
 figure 2.png)
Mathematics