Haga un paralelo entre el término aritmética y el término álgebra​

What is the 12th term of b(n)=-4-2(n-1)

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?