Provide an appropriate response.z varies directly as the square of x and inversely as y. Find z when x = 9, y = 15, and the constant of combined variation is 20.
A. 6.75
B. 240
C. 101.25
D. 108
Answer: D
Mathematics
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Solve the problem.It costs $400 to start up a business of selling hot dogs. Each hot dog costs 
to produce. Find the cost function C(x) = mx + b whose input is the number of hot dogs and whose output is the total cost.
A. C(x) = 55x + 400 B. C(x) = 400x + 0.55 C. C(x) = 0.55x + 400 D. C(x) = 0.55x - 400
Mathematics
Find the amount of sales tax or tax rate and the total cost. Round money answers to the nearest cent if necessary.Amount of sale: $730 Amount of tax: $43.80
A. 7%, $773.80 B. 6%, $773.80 C. 0.6%, $773.80 D. 8%, $773.80
Mathematics
Graph the function.y = sin ?x
A. 
B. 
C. 
D. 
Mathematics
Find the midpoint of the line segment PQ. P(4, 7), Q(6, 7)
A) M (5, 6) B) M (1, 0) C) M (7, 7) D) M (10, 10) E) M (5, 7)
Mathematics