Solve the problem.Suppose y = mx + b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If m = 1.3 and b = -4, find y when x is 120 min.
A. 160 min
B. 125.2 min
C. 152 min
D. 114.8 min
Answer: C
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Solve the problem.Ron attends a cocktail party (with his graphing calculator in his pocket). He wants to limit his food intake to 136 g protein, 125 g fat, and 174 g carbohydrate. According to the health conscious hostess, the marinated mushroom caps have 3 g protein, 5 g fat, and 9 g carbohydrate; the spicy meatballs have 14 g protein, 7 g fat, and 15 g carbohydrate; and the deviled eggs have 13 g protein, 15 g fat, and 6 g carbohydrate. How many of each snack can he eat to obtain his goal?
A. 3 mushrooms, 9 meatballs, 5 eggs B. 9 mushrooms, 5 meatballs, 3 eggs C. 10 mushrooms, 6 meatballs, 4 eggs D. 5 mushrooms, 3 meatballs, 9 eggs
Find the vertex for the parabola whose equation is given.y = x2 - 7x + 5
A. (- 
, 
)
B. (
, 
)
C. (- 
, 
)
D. (
, - 
)
Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Factor completely. If unfactorable, indicate that the polynomial is prime.x4 + 5x3 + 27x + 135
A. (x + 5)(x3 + 27) B. (x + 5)(x + 3)(x2 - 3x + 9) C. (x + 5)(x - 3)(x2 + 3x + 9) D. prime