Paulo has a certain amount of money. if he spends $600,then he has 1forth of the original amount left.

What is the solution to the equation 9^(x+1) =27

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.