Write an expression for the perimeter of the triangle

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?