Mentally evaluate the expression.
? 
? 
? 
A. - 
B. 
C. - 
D. 
Answer: D
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Solve the problem.The number of cows that can graze on a ranch is approximated by C = 9x + 5y - 5, where x is the number of acres of grass and y the number of acres of alfalfa. If the ranch has 80 acres of alfalfa and 65 acres of grass, how many cows may graze?
A. 980 cows B. 1045 cows C. 1040 cows D. 985 cows
Find the exact values of the indicated trigonometric functions. Write fractions in lowest terms.
Find sin A and tan A.
A. sin A = 
; tan A = 
B. sin A = 
; tan A = 
C. sin A = 
; tan A = 
D. sin A = 
; tan A = 
Find the measure of the indicated angle.?ADB
A. m?ADB = 48° B. m?ADB = 60° C. m?ADB = 42° D. m?ADB = 204°
Give a rule for the piecewise-defined function. Then give the domain and range.
A. f(x) = 
; Domain: {-6, -1}, Range: (-?, ?)
B. f(x) = 
; Domain: (-?, ?), Range: {-6, -1}
C. f(x) = 
; Domain: {-6, -1}, Range: (-?, ?)
D. f(x) = 
; Domain: (-?, ?), Range: {-6, -1}