Solve the problem.Find sin ?, given that cos 2? = 
and 0 < ? < 
.
A. 
B. 
C. 
D. 
Answer: A
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Find the slope-intercept form of the equation of the line with the given properties.Slope = - 
; y-intercept = 3
A. y = 
x + 3
B. y = - 
x + 4
C. y = - 
x + 4
D. y = - 
x + 3
Solve the problem.The length of a rectangular room is 9 feet longer than twice the width. If the room's perimeter is 
what are the room's dimensions?
A. width = 52 ft; length = 122 ft B. width = 26 ft; length = 61 ft C. width = 39 ft; length = 48 ft D. width = 31 ft; length = 71 ft
Solve the problem.The table lists the average annual cost (in dollars) of tuition and fees at a certain 2-year college for selected years, where year 1 represents 1992, year 3 represents 1994, and so on. Use the ordered pairs (3, 1137) and (9, 1318) to find the equation of a line that approximates the data. (If necessary, round the slope to the nearest hundredth and the y-intercept to the nearest whole number.) 
A. y = 60.33x + 956 B. y = 30.17x + 956 C. y = 30.17x - 1228 D. y = 30.17x + 1047
Find the slope and y-intercept of the line.-x + 12y = 72
A. slope = 
; y-intercept = 6
B. slope = -1; y-intercept = 72
C. slope = - 
; y-intercept = 6
D. slope = 12; y-intercept = -72