Subtract.(27x + 19xy - 14y) - (13x - 5xy - 16y)

A. 14x - 24xy - 30y
B. 40xy
C. 8x - 14xy + 30
D. 14x + 24xy + 2y


Answer: D

Mathematics

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Solve the problem.It takes 4 gallons of paint to paint 3 classrooms. How much paint is required to paint 11 classrooms?

A. 49 gallons
B. 7 gallons
C. 2 gallons
D. 16 gallons

Mathematics

Interpret the linear equation.The monthly cost of a certain long distance service is given by the linear function  where y is in dollars and x is the amount of time in minutes called in a month. Find and interpret the slope and y-intercept of the linear equation.

A. m = 0.04; The number of minutes called in a month increases 0.04 for every dollar spent. b = 7.95; The number of minutes that can be called when x = 0 is 7.95. B. m = 7.95; The number of minutes called in a month increases 7.95 for every dollar spent. b = 0.04; The number of minutes that can be called when x = 0 is 0.04. C. m = 0.04; The cost of the long distance service increases $0.04 for every 1 minute called. b = 7.95; The cost of the long distance service is $7.95 if no calls are made for the month. D. m = 7.95; The cost of the long distance service increases $7.95 for every 1 minute called. b = 0.04; The cost of the long distance service is $0.04 if no calls are made for the month.

Mathematics

Simplify the expression. 

A. 6 - z
B.
C.  - 6
D. z - 6

Mathematics

Determine the constant that should be added to the binomial so that it becomes a perfect square trinomial. Then write and factor the trinomial.x2 + 6x

A. 6; x2 + 6x + 6 = (x + 36)2 B. 36; x2 + 6x + 36 = (x + 6)2 C. 9; x2 + 6x + 9 = (x + 3)2 D. 3; x2 + 6x + 3 = (x + 9)2

Mathematics