Use a product-to-sum identity to rewrite the expression.sin 7° sin 45°
A. 0.5(cos (38°) + cos(52°))
B. 0.5(cos (38°) - cos(52°))
C. 0.5(sin(52°) - sin (38°))
D. 0.5(sin (38°) + sin(52°))
Answer: B
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Graph the line.y = -2x
A. 
B. 
C. 
D. 
Solve the problem.When a tow truck is called, the cost of the service is given by the linear function 
, where y is in dollars and x is the number of miles the car is towed. Find and interpret the slope and y-intercept of the linear equation.
A. m = 45; The cost of the service increases $45 every mile the car is towed. 
; The cost of the service is $2 if the car is not towed.
B. m = 45; The number of miles the car is towed increases 45 miles for every dollar spent on the service. 
; The tow truck will tow the car 2 miles for no cost.
C. m = 2; The number of miles the car is towed increases 2 miles for every dollar spent on the service. 
; The tow truck will tow the car 45 miles for no cost.
D. m = 2; The cost of the service increases $2 every mile the car is towed. 
; The cost of the service is $45 if the car is not towed.
Solve the problem.Suppose that the sample space is S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and that outcomes are equally likely. Compute the probability of the event E = {1, 2, 4, 5, 7, 9, 10}.
A. 
B. 7
C. 
D. 
Evaluate the expression with the given replacement values.x2 when x = -9
A. -18 B. 18 C. 81 D. -81