Select the curve represented by the parametric equations.
?
?
A. ?
B. ?
?
C. ?
D. ?
E. ?
Answer: B
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Write in if-then form.x = 9 if 2x + 9 = 27.
A. If x ? 9, then 2x + 9 = 27. B. If 2x + 9 ? 27, then x = 9. C. If 2x + 9 = 27, then x = 9. D. If x = 9, then 2x + 9 = 9.
Use the distributive property to find the product.(9p - 1)(81p2 + 9p + 1)
A. 729p3 + 1 B. 729p3 - 1 C. 81p3 - 1 D. 729p3 + 90p2 - 1
Interpret the linear equation.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 = 40; The number of miles the car is towed increases 40 miles for every dollar spent on the service. b = 3; The tow truck will tow the car 3 miles for no cost. B. m = 40; The cost of the service increases $40 every mile the car is towed. b = 3; The cost of the service is $3 if the car is not towed. C. m = 3; The cost of the service increases $3 every mile the car is towed. b = 40; The cost of the service is $40 if the car is not towed. D. m = 3; The number of miles the car is towed increases 3 miles for every dollar spent on the service. b = 40; The tow truck will tow the car 40 miles for no cost.
Solve the system of equations using substitution.
A. x = -8, y = -7; x = -7, y = -8 or (-8, -7), (-7, -8) B. x = 8, y = 7; x = 7, y = 8 or (8, 7), (7, 8) C. x = -8, y = 7; x = -7, y = 8 or (-8, 7), (-7, 8) D. x = 8, y = -7; x = 7, y = -8 or (8, -7), (7, -8)