Use an algebraic approach to solve the problem. A total of $8000 was invested, part of it at 7% interest and the remainder at 9%. If the total yearly interest amounted to $660, how much was invested at each rate?

1. what expression would be the same as 6x+x+0 2. find the prime factorization of 60 3. write the expression for 6 + x in words.

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?