7. a total of $12,000 was invested in two types of bonds. one pays 8% simple interest while the other
pays 10.5%. last year, the annual interest earned on the two investments was $1,145. how much was
invested at each rate?

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,

Its a right angled triangle not a right triangle