Select the curve represented by the parametric equations.
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A. ?


B. ?

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C. ?


D. ?


E. ?



Answer: B

Mathematics

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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.

Mathematics

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

Mathematics

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.

Mathematics

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)

Mathematics