If each dimension of the rectangular prism is doubled, how will its total surface area change?

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the surface area doubles.
the surface area triples.
the surface area increases by a factor of four.
the surface area increases by a factor of eight.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.